Free Tools
157 free online tools
AI Tools
AI Content Detector — Free Text Analysis
Analyze text for AI-generated patterns using perplexity, burstiness, and vocabulary diversity. Free, private — runs entirely in your browser.
AI Image Prompt Builder — Midjourney & More
Build prompts for Midjourney, DALL-E, Stable Diffusion, and Flux. Style, lighting, and composition controls. Free prompt tool.
AI Model Comparison — 50+ Models Side by Side
Compare 50+ AI models: pricing, context windows, capabilities, and benchmarks. Filter by provider, open source, and features.
AI Prompt Generator — Structured Builder
Build structured prompts for ChatGPT, Claude, and other AI models. Select role, task, context, and format. Free prompt engineering tool.
AI Text Analyzer — Pattern & Style Metrics
Analyze text patterns: sentence variation, vocabulary diversity, repetition, and burstiness scores. Free writing analysis tool.
AI Token Counter — GPT, Claude & Gemini
Count tokens for GPT, Claude, Gemini, and other AI models. Estimate costs per API call with built-in pricing. Free online tool.
Context Window Visualizer — AI Token Usage
See how much of each AI model's context window your text fills. Visual progress bars and cost estimates for GPT, Claude, and Gemini.
Fine-Tuning Data Formatter — JSONL Export
Convert CSV, JSON, or manual input into JSONL format for OpenAI and Anthropic fine-tuning. Token count and cost estimates included.
Image Metadata Viewer — EXIF & GPS Data
View EXIF data, camera info, GPS coordinates, and AI generation markers from any image. Free, private — runs in your browser.
JSON Schema Validator — Free Online Tool
Validate JSON data against a JSON Schema instantly. Perfect for AI function calling and API validation. Free, browser-based.
LLM Pricing Calculator — Compare 50+ Models
Compare costs across 50+ AI models side by side. Calculate pricing for GPT, Claude, Gemini, Llama, and more. Free cost estimator.
Readability Checker — Flesch Score & More
Check text readability with Flesch-Kincaid, SMOG, Gunning Fog, and Coleman-Liau scores. See grade level and audience fit. Free tool.
System Prompt Builder — AI Instructions
Build structured system prompts for ChatGPT, Claude, and other AI models. Model-specific export formats. Free prompt builder.
Business
Email Signature Generator — Free HTML
Create professional HTML email signatures with name, title, photo, and social links. Multiple templates and styles. Free online tool.
Invoice Generator — Free PDF Invoices
Create professional PDF invoices with line items, tax, and company details. Live preview, print or save as PDF. Free — works entirely in your browser.
Privacy Policy Generator — GDPR Compliant
Generate a GDPR-compliant privacy policy for your website or app. Customizable for cookies, analytics, and payments. Free template.
Date & Time
Public Holidays Calendar — 22 Countries
Browse public holidays and special awareness days for 22 countries. Interactive calendar with algorithmic Easter calculation. Works for any year — past and future.
Week Number Calculator — ISO 8601 & US Weeks
Calculate ISO 8601, US, and UK/EU week numbers for any date. Understand how different countries number weeks in the year.
Design
Color Contrast Checker — WCAG Accessibility
Check color combinations against WCAG 2.1 AA and AAA accessibility standards. See contrast ratio and pass/fail status. Free tool.
Color Converter — HEX, RGB, HSL & CMYK
Convert colors between HEX, RGB, HSL, and CMYK instantly. Live preview, one-click copy. Free tool for designers and developers.
Color Harmony Finder — 7 Harmony Types
Generate color harmonies from any base color. Complementary, analogous, triadic, and more. Export as CSS variables. Free tool.
Color Palette Generator — Harmonious Schemes
Generate harmonious color palettes based on color theory. Copy HEX codes instantly. Free design tool for beautiful color combinations.
Color Picker — HEX, RGB & HSL Values
Pick colors from a visual spectrum and get HEX, RGB, and HSL values. Save history, view harmonies. Free online color picker.
CSS Animation Generator — Visual Builder
Build CSS keyframe animations visually with live preview and copy-ready code. Customize timing, easing, and properties. Free tool.
CSS Box Shadow Generator — Visual Editor
Create and preview CSS box shadows with intuitive sliders. Multiple layers, inset shadows, live preview. Copy CSS with one click.
CSS Flexbox Generator — Visual Builder
Build CSS flexbox layouts visually with live preview and ready-to-copy code export. Free online flexbox playground.
CSS Gradient Generator — Visual Editor Free
Create beautiful linear and radial CSS gradients with a visual editor. Copy ready-to-use CSS code. Free online gradient builder.
CSS Grid Generator — Drag & Drop Builder
Build CSS grid layouts visually with drag-to-resize columns and rows. Live preview with ready-to-copy CSS. Free online tool.
Curated Color Palettes — 30+ Handpicked
Browse 30+ handpicked color palettes for design inspiration. Filter by mood (warm, cool, pastel). Copy hex codes or export as CSS.
Device Mockup Generator — Free & Instant
Place screenshots into realistic device frames: iPhone, MacBook, iPad, and more. Custom backgrounds. Download as PNG. Free tool.
Favicon Generator — Create Icons from Text
Create favicons from text with custom colors and shapes. Download as PNG in multiple sizes (16x16 to 512x512). Free online tool.
Font Pairing Suggester — Google Fonts Free
Discover beautiful Google Fonts pairings with live preview. Browse curated heading and body font combinations. Copy CSS instantly.
Glassmorphism Generator — Frosted Glass CSS
Generate CSS for frosted glass effects with live preview and presets. Adjust blur, transparency, and border. Copy CSS instantly.
Image Color Extractor — Get Palette Free
Extract dominant colors and palettes from any image. Get HEX and RGB values instantly. Export as CSS variables. Free and private.
Neumorphism Generator — Soft UI CSS Free
Generate CSS for soft UI neumorphic elements with live preview. Adjust size, radius, and colors. Copy CSS with one click. Free.
SVG Pattern Generator — Background Patterns
Create repeatable SVG background patterns. 8 presets, adjustable size, color, and opacity. Copy as SVG or CSS. Free design tool.
Tint & Shade Generator — Color Variations
Generate tints and shades from any base color. Full palette from light to dark. Click to copy hex values. Free design tool.
Typography Scale Calculator — CSS Export
Generate harmonious type scales for web design. Popular ratios with live preview and CSS custom properties export. Free design tool.
Web Font Converter — @font-face CSS Free
Load and preview web fonts (TTF, OTF, WOFF, WOFF2). Generate @font-face CSS and base64 data URIs. Free browser-based tool.
Developer Tools
API Request Builder — cURL, Python & JS
Build API requests for OpenAI, Anthropic, and Google AI. Generate ready-to-use code in cURL, Python, and JavaScript. Free tool.
Base64 Encoder & Decoder — Free Online
Encode text to Base64 or decode Base64 back to text instantly. Full Unicode support. Free, private, browser-based.
Browser Compatibility Checker — Can I Use
Check browser support for CSS, JavaScript, HTML, and Web API features. Filter by support level across Chrome, Firefox, Safari, and Edge.
Chmod Calculator — Unix File Permissions
Calculate Unix file permissions visually. Convert between symbolic and numeric (octal) notation. Free tool for developers and sysadmins.
Code to Image — Beautiful Code Screenshots
Turn code snippets into beautiful, shareable images with syntax highlighting. Custom themes, backgrounds, and window styles. Free.
Cron Expression Builder — Visual & Free
Build cron expressions visually with human-readable output and next run preview. No syntax memorization needed. Free online tool.
Cron Expression Parser — Human-Readable
Parse and explain cron expressions in plain English. See next run times and validate your schedule. Free online cron debugger.
CSS Minifier — Reduce CSS Size Instantly
Minify CSS code by removing whitespace, comments, and unnecessary characters. See exact savings. Free browser-based tool.
CSV to JSON Converter — Auto-Detect Format
Convert CSV data to JSON format instantly. Auto-detects delimiters and headers. Free, private, browser-based — no upload needed.
CSV/Excel Viewer — Sortable Table Free
View CSV and TSV files as interactive, sortable tables in your browser. Search rows, sort columns. Free — no upload to any server.
Diff Checker — Compare Text Side by Side
Compare two texts and see differences highlighted line by line. Color-coded additions and deletions. Free, private, no upload needed.
HTML Entity Encoder & Decoder — Free
Encode special characters to HTML entities or decode entities back to text. Common entities reference included. Free online tool.
HTML Minifier — Reduce File Size Instantly
Minify HTML by removing comments, whitespace, and unnecessary characters. See exact savings. Free browser-based tool.
HTML to Markdown Converter — Instant & Free
Convert HTML code to clean Markdown syntax. Handles headings, lists, links, tables, code blocks. Free browser-based converter.
HTTP Status Codes — Complete Reference
Complete reference of all HTTP status codes with descriptions and common use cases. Searchable and filterable. Free developer resource.
JavaScript Minifier — Reduce JS Size Free
Minify JavaScript code by removing whitespace, comments, and shortening variable names. See exact savings. Free online tool.
JSON Formatter & Validator — Instant Results
Format, validate, and minify JSON with instant error highlighting. Pinpoints syntax errors. Free, private, browser-based.
JSON to CSV Converter — Export Instantly
Convert JSON arrays to CSV format with automatic header detection. Download as CSV file. Free, browser-based — no upload needed.
JSON to TypeScript — Interface Generator
Convert JSON objects to TypeScript interfaces instantly. Supports nested objects, arrays, optional and readonly properties. Free online tool.
JSON to XML Converter — Instant & Free
Convert JSON data to XML format with proper indentation and escaping. Free, browser-based converter — no upload needed.
JSON Tree Viewer — Expandable Visualizer
Visualize JSON data as an expandable, collapsible tree. Search keys and values, copy JSON paths. Free online JSON explorer.
JWT Decoder — Inspect Tokens Instantly
Decode and inspect JSON Web Tokens instantly. View header, payload, and expiration. Free, private — your tokens stay in your browser.
Lorem Ipsum Generator — Free Placeholder Text
Generate placeholder text for your designs, mockups, and layouts. Choose paragraphs, sentences, or word count. One-click copy.
Markdown Editor — Live Preview & Export
Split-pane Markdown editor with live HTML preview. Write, preview, and export Markdown instantly. Free online editor — works instantly in your browser.
Markdown Preview — Live Side-by-Side View
Write Markdown and see the rendered output in real-time. Split-pane editor with full CommonMark support. Free and browser-based.
Markdown Table Generator — Visual Editor
Create tables visually and export as Markdown, HTML, or CSV. Import from CSV or paste from spreadsheets. Free online tool.
Markdown to HTML Converter — Live Preview
Convert Markdown text to clean HTML code with live preview. Copy generated HTML instantly. Free online converter.
PX to REM Converter — CSS Unit Calculator
Convert pixels to REM and REM to pixels with custom base font size. Quick reference table with visual preview. Free CSS unit converter.
Regex Tester — Live Matching & Highlighting
Test regular expressions with live matching and highlighting. Supports all flags and capture groups. Free online regex debugger.
Responsive Design Tester — Multi-Device
Preview any URL at multiple screen sizes simultaneously. Test responsive layouts on mobile, tablet, and desktop. Free online tool.
SQL Formatter — Beautify Queries Online
Format SQL queries with proper indentation and keyword highlighting. Supports all major SQL dialects. Free online SQL beautifier.
SVG Optimizer — Minify & Clean SVG Files
Optimize and minify SVG code by removing metadata, editor data, and unnecessary attributes. See file size savings. Free tool.
Text to Binary Converter — Hex & Octal Too
Convert text to binary, hexadecimal, and octal and back. Includes ASCII table reference. Free online converter tool.
Unix Timestamp Converter — Date & Time
Convert between Unix timestamps and human-readable dates instantly. Supports seconds and milliseconds. Free developer tool.
URL Encoder & Decoder — Free Online Tool
Encode or decode URLs and special characters for web use. Instant results, browser-based. Essential tool for web developers.
UUID & ULID Generator — Bulk & Secure
Generate UUIDs (v4) and ULIDs in bulk. Cryptographically secure, browser-based. Generate up to 50 IDs at once. Free online tool.
XML Formatter — Prettify & Validate Free
Format and prettify XML with proper indentation and syntax validation. Customizable indent size. Free online XML beautifier.
YAML ↔ JSON Converter — Instant & Free
Convert between YAML and JSON formats instantly. Bidirectional conversion with syntax validation. Free online developer tool.
Education
Finance
Bruto/Netto Calculator — Dutch Salary 2026
Calculate Dutch gross to net salary with 2026 tax brackets, AHK, and employment tax credit. Instant results. Free online tool.
BTW Calculator — Dutch VAT (21% & 9%)
Calculate Dutch VAT (BTW) instantly. Convert between excl. and incl. amounts for 21% and 9% rates. Free online calculator.
Compound Interest Calculator — Free & Visual
Calculate compound interest on savings and investments. Visual growth chart, year-by-year breakdown, and formula explained. Free tool.
Hypotheek Calculator — Maandlasten Berekenen
Calculate Dutch mortgage payments, interest, and total cost. Compare annuity vs linear repayment. Free online hypotheek calculator.
IBAN Validator — Check 80+ Countries
Validate IBAN numbers from 80+ countries with MOD-97 check digit verification. Detects country, bank, and format errors instantly.
Loan Calculator — Payments & Amortization
Calculate monthly loan payments, total interest, and full amortization schedule. Compare two loan scenarios side by side. Free tool.
Mortgage Calculator — Payments & Amortization
Calculate mortgage payments, total interest, and full amortization schedule. Supports monthly, bi-weekly, and weekly payment frequencies.
Salary Calculator — Annual to Hourly Rate
Convert between annual salary, monthly, biweekly, weekly, daily, and hourly rates instantly. Multi-currency support. Free tool.
VAT Calculator — All 27 EU Countries
Calculate VAT for all 27 EU countries. Convert between amounts excluding and including VAT. Instant results with correct rates.
Fun
Generators
Baby Name Generator — 13 Origins Worldwide
Find the perfect baby name. Browse boy and girl names from 13 origins worldwide. Save favorites, filter by letter. Free name finder.
Barcode Generator — Code 128, EAN-13, UPC-A & More
Generate barcodes in 6 formats: Code 128, Code 39, EAN-13, EAN-8, UPC-A, and ITF. Auto check digit, live preview, PNG and SVG download. Free, runs in your browser.
Fantasy Name Generator — 10 Unique Styles
Generate unique fantasy names for characters, games, and stories. 10 styles including Elvish, Dwarven, and Sci-Fi. Free and instant.
Free QR Code Generator — URL, WiFi & More
Create free QR codes for URLs, text, WiFi, email, and phone numbers. Static codes that never expire. Works offline in your browser.
Health
BMI Calculator — Free Body Mass Index Tool
Calculate your Body Mass Index based on height and weight. See your BMI category instantly. Free online health calculator.
Calorie Calculator — BMR & TDEE
Calculate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE). See calories for weight loss, maintenance, and weight gain.
Images
Bulk Image Resizer — Batch Resize Free
Resize multiple images at once with presets for social media, web, or custom sizes. Download all as ZIP. Free, browser-based.
Compress Images Online — No Upload Required
Resize and compress JPG, PNG, and WebP images directly in your browser. Reduce file size up to 80% with no quality loss. Free and private.
Free Stock Photo Search — 4 Sites at Once
Search Unsplash, Pexels, Pixabay, and StockCake in one place. Find royalty-free images for any project. Free stock photo finder.
Image Cropper — Aspect Ratio Presets Free
Crop images with aspect ratio presets (16:9, 1:1, passport) directly in your browser. No upload needed. Free online tool.
Image Format Converter — PNG, JPEG & WebP
Convert images between PNG, JPEG, and WebP formats with quality control. Free browser-based tool — no upload, instant results.
Image Resizer — Exact Dimensions Free
Resize images to exact dimensions or percentages. Maintains quality with browser-based processing. Free, private — no upload needed.
Image to Text (OCR) — Free & Private
Extract text from images using OCR. Supports PNG, JPG, WebP, and BMP. Runs entirely in your browser — no upload to any server.
Image Watermark — Add Text Overlay Free
Add text watermarks to images directly in your browser. Custom font, color, opacity, and position. No upload needed. Free tool.
Screenshot Beautifier — Free & Private
Add beautiful backgrounds, padding, shadows, and browser frames to your screenshots. Like shots.so but fully client-side. Free tool.
Math
Age Calculator — Exact Years, Months & Days
Calculate your exact age in years, months, and days from your date of birth. See total days alive and next birthday countdown.
Aspect Ratio Calculator — Resize Proportionally
Calculate aspect ratios and resize dimensions while maintaining proportions. Common presets for video, photo, and design. Free online.
Date Calculator — Add Days & Find Differences
Calculate the difference between two dates or add/subtract days from any date. Shows years, months, and days. Free online tool.
Date Difference Calculator — Days Between
Calculate the exact difference between two dates in years, months, days, weeks, and hours. Includes countdown feature. Free online tool.
Length Converter — Meters, Feet & Miles
Convert between meters, feet, inches, miles, kilometers, and 13 length units. Instant results with full reference table.
Number Base Converter — Binary, Hex & More
Convert between binary, octal, decimal, and hexadecimal number systems instantly. Free online tool for developers and students.
Percentage Calculator — 4 Calculators in One
Calculate percentages instantly: X% of Y, percentage change, tip calculator and more. Four calculators in one free tool.
Random Number Generator — Fast & Secure
Generate random numbers within any range. Unique or with duplicates, bulk generation, quick presets. Cryptographically secure.
Unit Converter — Length, Weight & More
Convert between length, weight, temperature, speed, and data units. Instant results with all common units. Free online tool.
Weight Converter — kg, lbs, Stone & More
Convert between kilograms, pounds, stone, ounces, tonnes and 12 weight units. Instant results with reference table. Free online.
Math & Finance
Meeting Cost Calculator — Live Timer
Calculate the true cost of meetings based on attendees and hourly rates. Includes a live meeting timer with running total. Free tool.
Time Zone Converter — World Clock Free
Convert time between different time zones instantly. Compare multiple zones at once. Free online world clock and converter.
Media Tools
Network Tools
Compress PDF Online — Reduce File Size Free
Reduce PDF file size by up to 70% by rebuilding the document structure. Free, private, and instant — your files never leave your browser.
Image to PDF Converter — Free Online Tool
Convert JPG and PNG images to PDF instantly. Choose A4 or custom size, drag to reorder. Free and browser-based — no upload required.
Merge PDF Files Online — Free & Instant
Combine multiple PDF files into one document instantly. Free, no upload needed — everything runs in your browser. Drag to reorder pages.
PDF Text Extractor — Copy Text Free
Extract all text content from PDF files instantly. Client-side processing — your files never leave your device. Free online tool.
PDF to Image Converter — PNG & JPEG Free
Convert PDF pages to high-quality PNG or JPEG images. Free online tool — no upload needed. Works instantly in your browser.
Reorder PDF Pages — Drag & Drop Free
Rearrange, reorder, or delete pages in a PDF file. Visual drag-and-drop interface. Download as new PDF. Free and browser-based.
Split PDF Online — Extract Pages for Free
Extract specific pages from a PDF or split it into multiple files. Select pages by range or individually. Free and browser-based.
Productivity
Online Stopwatch — Lap Times & Precision
Precise online stopwatch with lap times. Start, stop, and reset with one click. Free, works in any browser — no install needed.
Pomodoro Timer — Free Online Focus Timer
Stay focused with the Pomodoro technique. 25 min work, 5 min break cycles with notifications. Free online timer — no install needed.
Typing Test — Free WPM Speed Test
Test your typing speed and accuracy in words per minute. Track WPM, accuracy, and character stats. Free online typing test.
Security
Encryption Tool — AES-256 Browser-Based
Encrypt and decrypt text using AES-256-GCM, entirely in your browser. Your data never leaves your device. Free and secure.
Hash Generator — SHA-256, SHA-512 & More
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes securely in your browser. Uses Web Crypto API — your data never leaves your device.
Password Strength Tester — Free & Private
Test password strength with estimated crack time, entropy analysis, and pattern detection. Runs locally — your password never leaves your device.
Strong Password Generator — Secure & Random
Generate strong, secure passwords with customizable length and complexity. Uses browser cryptography for true randomness — nothing is stored or transmitted. Free online password generator.
SEO
Keyword Density Analyzer — SEO Checker
Analyze word frequency, n-gram density, and keyword distribution for SEO optimization. See overused and underused terms. Free tool.
Meta Tag Generator — SEO Tags in Seconds
Generate optimized SEO meta tags for your website. Title, description, Open Graph, robots, and canonical tags. Free with live preview.
Open Graph Preview — Social Share Tester
Preview how your page will look when shared on Facebook, Twitter, and LinkedIn. Test Open Graph tags before publishing. Free tool.
robots.txt Generator — SEO Crawl Control
Generate a robots.txt file to control search engine crawling. Set rules for specific bots and paths. Free online generator.
Schema Markup Generator — JSON-LD Free
Generate JSON-LD structured data for better search engine results. Organization, Article, FAQ, Product and more schema types.
URL Slug Generator — SEO-Friendly Slugs
Generate SEO-friendly URL slugs from any text. Handles accents, special characters, and Unicode. Free instant tool.
XML Sitemap Generator — Free SEO Tool
Generate valid XML sitemaps from a list of URLs. Set custom frequency, priority, and last modified dates. Free online sitemap builder.
Testing
Credit Card Validator — Luhn Check Free
Validate credit card numbers using the Luhn algorithm. Detects card type (Visa, Mastercard, Amex). Free, private, browser-based.
Test BSN Generator — Dutch Elfproef Valid
Generate valid Dutch BSN test numbers that pass the elfproef (11-check). Perfect for development and testing. Free online tool.
Test Document Number Generator — Dutch IDs
Generate Dutch test document numbers for ID cards, passports, and driving licenses. Valid format for development and testing.
Test IBAN Generator — Valid Test IBANs
Generate valid test IBAN numbers for development and testing. Passes checksum validation. Free tool for developers and QA teams.
Text & Content
Character Counter — Free Online Character Count Tool
Count characters, words, sentences, and paragraphs with character frequency analysis. Live counting as you type. Free, private, no signup.
Citation Generator — APA, MLA & Chicago
Generate APA 7th, MLA 9th, and Chicago style citations for websites, books, and journal articles. Copy formatted citations. Free.
Emoji Picker & Search — Copy Instantly
Search and copy emojis instantly. Browse by category, search by name, see recently used. Click to copy. Free online emoji finder.
Plagiarism Checker — Compare Texts Free
Compare two texts side by side and get a similarity percentage. Highlights matching sentences. Free, private — runs in your browser.
Text & Speech
Fancy Text Generator — Unicode Fonts Free
Transform your text into stylish Unicode fonts: bold, italic, cursive, gothic, and more. Copy-paste anywhere. Free instant generator.
Text Case Converter — 7 Formats Instantly
Convert text to UPPERCASE, lowercase, Title Case, camelCase, snake_case and more. Instant results, free online tool.
Text Similarity Analyzer — Compare Texts
Compare two texts for similarity using Jaccard, cosine, and Levenshtein algorithms. Get detailed similarity scores. Free and private.
Text to Speech — Free Online TTS
Convert text to speech using your browser's built-in voices. Choose voice, speed, and pitch. Free, private — no data uploaded.
Word Counter & Character Counter — Free Online
Count words, characters, sentences, and paragraphs with reading time estimate. Includes keyword density analysis and character count with and without spaces. Free, instant, and private.
Utilities
Discount Calculator — Sale Price & Savings
Calculate sale price from discount percentage, stack multiple discounts, or find the discount rate. Add tax after discount. Free tool.
Free Tip Calculator — Split Bills & Calculate Tips Instantly
Calculate the right tip amount and split the bill evenly. Free online tip calculator with custom percentages for restaurants, delivery, and group dining.
Morse Code Translator — Text & Audio Free
Convert text to Morse code and back with audio playback. Hear the dots and dashes. Free, browser-based Morse code tool.
Web Tools
Domain Name Checker — Check Availability
Check if a domain name is available across .com, .net, .org, and more extensions. Instant results. Free online domain checker.
WHOIS Lookup — Domain Info & Registrar
Look up domain registration details: registrar, registration and expiry dates, name servers, and status. Free online WHOIS tool.