Free Tools

157 free online tools

AI Tools

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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.

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AI Tools

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 Tools

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.

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AI Tools

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.

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AI Tools

AI Text Analyzer — Pattern & Style Metrics

Analyze text patterns: sentence variation, vocabulary diversity, repetition, and burstiness scores. Free writing analysis tool.

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AI Tools

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.

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AI Tools

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.

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AI Tools

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.

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AI Tools

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.

AI Tools

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.

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AI Tools

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.

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AI Tools

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.

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AI Tools

System Prompt Builder — AI Instructions

Build structured system prompts for ChatGPT, Claude, and other AI models. Model-specific export formats. Free prompt builder.

Business

Date & Time

Design

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.

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Design

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.

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Design

Color Harmony Finder — 7 Harmony Types

Generate color harmonies from any base color. Complementary, analogous, triadic, and more. Export as CSS variables. Free tool.

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Design

Color Palette Generator — Harmonious Schemes

Generate harmonious color palettes based on color theory. Copy HEX codes instantly. Free design tool for beautiful color combinations.

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Design

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.

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Design

CSS Animation Generator — Visual Builder

Build CSS keyframe animations visually with live preview and copy-ready code. Customize timing, easing, and properties. Free tool.

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Design

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.

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Design

CSS Flexbox Generator — Visual Builder

Build CSS flexbox layouts visually with live preview and ready-to-copy code export. Free online flexbox playground.

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Design

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.

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Design

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.

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Design

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.

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Design

Device Mockup Generator — Free & Instant

Place screenshots into realistic device frames: iPhone, MacBook, iPad, and more. Custom backgrounds. Download as PNG. Free tool.

Design

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.

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Design

Font Pairing Suggester — Google Fonts Free

Discover beautiful Google Fonts pairings with live preview. Browse curated heading and body font combinations. Copy CSS instantly.

Design

Glassmorphism Generator — Frosted Glass CSS

Generate CSS for frosted glass effects with live preview and presets. Adjust blur, transparency, and border. Copy CSS instantly.

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Design

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.

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Design

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.

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Design

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.

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Design

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.

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Design

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.

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Design

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

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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.

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Developer Tools

Base64 Encoder & Decoder — Free Online

Encode text to Base64 or decode Base64 back to text instantly. Full Unicode support. Free, private, browser-based.

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Developer Tools

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.

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Developer Tools

Chmod Calculator — Unix File Permissions

Calculate Unix file permissions visually. Convert between symbolic and numeric (octal) notation. Free tool for developers and sysadmins.

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Developer Tools

Code to Image — Beautiful Code Screenshots

Turn code snippets into beautiful, shareable images with syntax highlighting. Custom themes, backgrounds, and window styles. Free.

Developer Tools

Cron Expression Builder — Visual & Free

Build cron expressions visually with human-readable output and next run preview. No syntax memorization needed. Free online tool.

Developer Tools

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.

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Developer Tools

CSS Minifier — Reduce CSS Size Instantly

Minify CSS code by removing whitespace, comments, and unnecessary characters. See exact savings. Free browser-based tool.

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Developer Tools

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.

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Developer Tools

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.

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Developer Tools

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.

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Developer Tools

HTML Entity Encoder & Decoder — Free

Encode special characters to HTML entities or decode entities back to text. Common entities reference included. Free online tool.

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Developer Tools

HTML Minifier — Reduce File Size Instantly

Minify HTML by removing comments, whitespace, and unnecessary characters. See exact savings. Free browser-based tool.

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Developer Tools

HTML to Markdown Converter — Instant & Free

Convert HTML code to clean Markdown syntax. Handles headings, lists, links, tables, code blocks. Free browser-based converter.

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Developer Tools

HTTP Status Codes — Complete Reference

Complete reference of all HTTP status codes with descriptions and common use cases. Searchable and filterable. Free developer resource.

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Developer Tools

JavaScript Minifier — Reduce JS Size Free

Minify JavaScript code by removing whitespace, comments, and shortening variable names. See exact savings. Free online tool.

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Developer Tools

JSON Formatter & Validator — Instant Results

Format, validate, and minify JSON with instant error highlighting. Pinpoints syntax errors. Free, private, browser-based.

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Developer Tools

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.

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Developer Tools

JSON to TypeScript — Interface Generator

Convert JSON objects to TypeScript interfaces instantly. Supports nested objects, arrays, optional and readonly properties. Free online tool.

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Developer Tools

JSON to XML Converter — Instant & Free

Convert JSON data to XML format with proper indentation and escaping. Free, browser-based converter — no upload needed.

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Developer Tools

JSON Tree Viewer — Expandable Visualizer

Visualize JSON data as an expandable, collapsible tree. Search keys and values, copy JSON paths. Free online JSON explorer.

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Developer Tools

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.

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Developer Tools

Lorem Ipsum Generator — Free Placeholder Text

Generate placeholder text for your designs, mockups, and layouts. Choose paragraphs, sentences, or word count. One-click copy.

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Developer Tools

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.

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Developer Tools

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.

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Developer Tools

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.

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Developer Tools

Markdown to HTML Converter — Live Preview

Convert Markdown text to clean HTML code with live preview. Copy generated HTML instantly. Free online converter.

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Developer Tools

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.

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Developer Tools

Regex Tester — Live Matching & Highlighting

Test regular expressions with live matching and highlighting. Supports all flags and capture groups. Free online regex debugger.

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Developer Tools

Responsive Design Tester — Multi-Device

Preview any URL at multiple screen sizes simultaneously. Test responsive layouts on mobile, tablet, and desktop. Free online tool.

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Developer Tools

SQL Formatter — Beautify Queries Online

Format SQL queries with proper indentation and keyword highlighting. Supports all major SQL dialects. Free online SQL beautifier.

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Developer Tools

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.

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Developer Tools

Text to Binary Converter — Hex & Octal Too

Convert text to binary, hexadecimal, and octal and back. Includes ASCII table reference. Free online converter tool.

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Developer Tools

Unix Timestamp Converter — Date & Time

Convert between Unix timestamps and human-readable dates instantly. Supports seconds and milliseconds. Free developer tool.

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Developer Tools

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.

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Developer Tools

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.

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Developer Tools

XML Formatter — Prettify & Validate Free

Format and prettify XML with proper indentation and syntax validation. Customizable indent size. Free online XML beautifier.

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Developer Tools

YAML ↔ JSON Converter — Instant & Free

Convert between YAML and JSON formats instantly. Bidirectional conversion with syntax validation. Free online developer tool.

Education

Finance

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Finance🇳🇱 NL

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.

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Finance🇳🇱 NL

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.

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Finance

Compound Interest Calculator — Free & Visual

Calculate compound interest on savings and investments. Visual growth chart, year-by-year breakdown, and formula explained. Free tool.

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Finance🇳🇱 NL

Hypotheek Calculator — Maandlasten Berekenen

Calculate Dutch mortgage payments, interest, and total cost. Compare annuity vs linear repayment. Free online hypotheek calculator.

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Finance

IBAN Validator — Check 80+ Countries

Validate IBAN numbers from 80+ countries with MOD-97 check digit verification. Detects country, bank, and format errors instantly.

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Finance

Loan Calculator — Payments & Amortization

Calculate monthly loan payments, total interest, and full amortization schedule. Compare two loan scenarios side by side. Free tool.

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Finance

Mortgage Calculator — Payments & Amortization

Calculate mortgage payments, total interest, and full amortization schedule. Supports monthly, bi-weekly, and weekly payment frequencies.

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Finance

Salary Calculator — Annual to Hourly Rate

Convert between annual salary, monthly, biweekly, weekly, daily, and hourly rates instantly. Multi-currency support. Free tool.

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Finance

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

Health

Images

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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.

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Images

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.

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Images

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.

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Images

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.

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Images

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.

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Images

Image Resizer — Exact Dimensions Free

Resize images to exact dimensions or percentages. Maintains quality with browser-based processing. Free, private — no upload needed.

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Images

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.

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Images

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.

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Images

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

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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.

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Math

Aspect Ratio Calculator — Resize Proportionally

Calculate aspect ratios and resize dimensions while maintaining proportions. Common presets for video, photo, and design. Free online.

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Math

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.

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Math

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.

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Math

Length Converter — Meters, Feet & Miles

Convert between meters, feet, inches, miles, kilometers, and 13 length units. Instant results with full reference table.

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Math

Number Base Converter — Binary, Hex & More

Convert between binary, octal, decimal, and hexadecimal number systems instantly. Free online tool for developers and students.

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Math

Percentage Calculator — 4 Calculators in One

Calculate percentages instantly: X% of Y, percentage change, tip calculator and more. Four calculators in one free tool.

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Math

Random Number Generator — Fast & Secure

Generate random numbers within any range. Unique or with duplicates, bulk generation, quick presets. Cryptographically secure.

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Math

Unit Converter — Length, Weight & More

Convert between length, weight, temperature, speed, and data units. Instant results with all common units. Free online tool.

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Math

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

Media Tools

Network Tools

PDF

Productivity

Security

SEO

Testing

Text & Content

Text & Speech

Utilities

Web Tools