89+ free browser-based tools for developers, designers, and everyday use.
Your data never leaves your browser. No accounts. No ads. No tracking.
Every developer has a dozen bookmarked tool sites. JSON formatter here, Base64 decoder there, JWT debugger somewhere else. Half of them have aggressive ads, some now require sign-ups, and a few quietly send your data to their servers.
Anytools puts 89+ tools in one place, all running client-side in your browser. Your data stays on your machine.
| Tool | Description |
|---|---|
| JSON Formatter | Format, validate, and explore JSON with syntax highlighting and collapsible tree view |
| Base64 Encoder/Decoder | Encode and decode Base64 strings instantly |
| JWT Decoder | Decode and inspect JWT tokens -- header, payload, and signature |
| Regex Tester | Test regular expressions with live matching, capture groups, and explanations |
| UUID Generator | Generate v4 UUIDs, single or in bulk |
| Timestamp Converter | Convert between Unix timestamps and human-readable dates |
| Password Generator | Generate strong passwords with configurable length and character sets (Web Crypto API) |
| SHA Checksum | Generate SHA-1, SHA-256, and SHA-512 hashes |
| URL Encoder/Decoder | Encode and decode URLs and query parameters |
| Code Minifier | Minify JavaScript, CSS, and HTML with size comparison |
| SQL Formatter | Format and beautify SQL queries |
| YAML to JSON | Convert between YAML and JSON formats |
| Markdown Preview | Live GitHub-flavored Markdown rendering |
| QR Code Generator | Generate QR codes from any text or URL |
| Code Screenshot | Create beautiful code screenshots for sharing |
| Lorem Ipsum Generator | Generate placeholder text |
| Hash Generator | MD5, SHA-1, SHA-256, SHA-512 hash generation |
| Diff Checker | Compare two text blocks side by side |
| HTML Entity Encoder | Encode/decode HTML entities |
| Cron Expression Parser | Parse and explain cron expressions |
| JSON to CSV | Convert JSON arrays to CSV format |
| Text Case Converter | Convert between camelCase, snake_case, PascalCase, etc. |
| Slug Generator | Generate URL-friendly slugs from text |
| IP Address Lookup | Look up IP address information |
| HTTP Status Codes | Quick reference for HTTP status codes |
| Character Counter | Count characters, words, sentences, and paragraphs |
| Tool | Description |
|---|---|
| Color Palette Generator | Generate harmonious color palettes |
| Gradient Generator | Create CSS gradients with live preview |
| Contrast Checker | Check WCAG AA/AAA color contrast compliance |
| Color Converter | Convert between HEX, RGB, HSL, and OKLCH |
| CSS Flexbox Generator | Visual flexbox layout builder |
| CSS Grid Generator | Visual CSS Grid layout builder |
| Box Shadow Generator | Create CSS box shadows with live preview |
| Glassmorphism Generator | Generate glassmorphism CSS effects |
| Border Radius Generator | Visual border-radius editor |
| Text Shadow Generator | Create CSS text shadows |
| CSS Animation Generator | Build CSS animations visually |
| Clip-Path Generator | Create CSS clip-path shapes |
| CSS Loader Generator | Generate CSS loading spinners and animations |
| SVG Optimizer | Optimize and minify SVG files |
| Favicon Generator | Generate favicons from images or text |
| Image Compressor | Compress images without leaving your browser |
| Image Resizer | Resize images to specific dimensions |
| Image to Base64 | Convert images to Base64 data URIs |
| Font Pair Suggester | Get font pairing suggestions |
| CSS Unit Converter | Convert between px, rem, em, and other CSS units |
| Aspect Ratio Calculator | Calculate and maintain aspect ratios |
| Placeholder Image Generator | Generate placeholder images |
| CSS Filter Generator | Apply and preview CSS filter effects |
| Typography Scale | Generate typographic scales |
| Tool | Description |
|---|---|
| Compound Interest | Calculate compound interest with visualizations |
| Loan Calculator | Calculate loan payments and amortization |
| Mortgage Calculator | Monthly payment and total cost estimates |
| ROI Calculator | Calculate return on investment |
| Salary Calculator | Convert between hourly, monthly, and annual salary |
| Tip Calculator | Split bills and calculate tips |
| Percentage Calculator | Various percentage calculations |
| BMI Calculator | Calculate Body Mass Index |
| Age Calculator | Calculate exact age from date of birth |
| Date Difference | Calculate days between two dates |
| Discount Calculator | Calculate discounted prices |
| Fuel Cost Calculator | Estimate fuel costs for trips |
| GPA Calculator | Calculate grade point average |
| Unit Converter | Convert between units of measurement |
| Number Base Converter | Convert between binary, octal, decimal, hex |
| Scientific Calculator | Full-featured scientific calculator |
| Tool | Description |
|---|---|
| TDEE Calculator | Total Daily Energy Expenditure |
| Macro Calculator | Calculate protein, carbs, and fat targets |
| Calorie Deficit Calculator | Plan caloric deficit for weight loss |
| Body Fat Calculator | Estimate body fat percentage |
| One Rep Max Calculator | Estimate 1RM from submaximal lifts |
| Heart Rate Zone Calculator | Calculate training heart rate zones |
| Pace Calculator | Running/cycling pace and race time projections |
| Water Intake Calculator | Daily water intake recommendation |
| Sleep Calculator | Optimal bedtime/wake time based on sleep cycles |
| Protein Calculator | Daily protein intake recommendation |
| BMR Calculator | Basal Metabolic Rate |
| Ideal Weight Calculator | Ideal body weight estimation |
| Lean Body Mass Calculator | Calculate lean body mass |
| Army Body Fat Calculator | US Army body fat estimation method |
All tools run entirely in your browser. You can verify this yourself:
- Open any tool on anytools.io
- Open DevTools (Network tab)
- Paste your data and use the tool
- Watch the network tab -- zero outbound requests with your data
No cookies. No analytics. No tracking pixels. No server-side processing.
Found a bug? Have a tool suggestion? Open an issue.
The tools on anytools.io are free to use. This repository serves as documentation and a community hub.