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.
🌐 Multilingual keywords / Palabras clave / Mots-clés / Schlüsselwörter
Español: Herramientas gratuitas en línea para desarrolladores y diseñadores. Formateador JSON, decodificador JWT, generador de contraseñas, calculadora TDEE, generadores CSS. Sin registro, sin anuncios. Todo se procesa en el navegador.
Português: Ferramentas online gratuitas para desenvolvedores e designers. Formatador JSON, decodificador JWT, gerador de senhas, calculadora TDEE, geradores CSS. Sem cadastro, sem anúncios. Tudo processado no navegador.
Deutsch: Kostenlose Online-Tools für Entwickler und Designer. JSON-Formatter, JWT-Decoder, Passwort-Generator, TDEE-Rechner, CSS-Generatoren. Keine Registrierung, keine Werbung. Alles wird im Browser verarbeitet.
Français: Outils en ligne gratuits pour développeurs et designers. Formateur JSON, décodeur JWT, générateur de mots de passe, calculateur TDEE, générateurs CSS. Sans inscription, sans publicité. Tout est traité dans le navigateur.
日本語: 開発者とデザイナーのための無料オンラインツール。JSONフォーマッター、JWTデコーダー、パスワードジェネレーター、TDEE計算機、CSSジェネレーター。登録不要、広告なし。すべてブラウザで処理。
한국어: 개발자와 디자이너를 위한 무료 온라인 도구. JSON 포맷터, JWT 디코더, 비밀번호 생성기, TDEE 계산기, CSS 생성기. 가입 불필요, 광고 없음. 모든 처리는 브라우저에서.
Italiano: Strumenti online gratuiti per sviluppatori e designer. Formattatore JSON, decoder JWT, generatore di password, calcolatore TDEE, generatori CSS. Senza registrazione, senza pubblicità. Tutto elaborato nel browser.
Türkçe: Geliştiriciler ve tasarımcılar için ücretsiz çevrimiçi araçlar. JSON biçimlendirici, JWT kod çözücü, şifre oluşturucu, TDEE hesaplayıcı, CSS oluşturucular. Kayıt gerektirmez, reklam yok. Her şey tarayıcıda işlenir.
العربية: أدوات مجانية عبر الإنترنت للمطورين والمصممين. منسق JSON، فك تشفير JWT، مولد كلمات المرور، حاسبة TDEE، مولدات CSS. بدون تسجيل، بدون إعلانات. كل شيء يُعالج في المتصفح.
हिन्दी: डेवलपर्स और डिज़ाइनरों के लिए मुफ़्त ऑनलाइन टूल। JSON फ़ॉर्मेटर, JWT डिकोडर, पासवर्ड जनरेटर, TDEE कैलकुलेटर, CSS जनरेटर। साइन-अप नहीं, विज्ञापन नहीं। सब कुछ ब्राउज़र में प्रोसेस होता है।
Bahasa Indonesia: Alat online gratis untuk developer dan desainer. JSON formatter, JWT decoder, password generator, kalkulator TDEE, CSS generator. Tanpa daftar, tanpa iklan. Semua diproses di browser.
Tiếng Việt: Công cụ trực tuyến miễn phí cho lập trình viên và nhà thiết kế. JSON formatter, JWT decoder, trình tạo mật khẩu, máy tính TDEE, CSS generator. Không cần đăng ký, không quảng cáo. Tất cả xử lý trên trình duyệt.
Polski: Darmowe narzędzia online dla programistów i projektantów. Formatowanie JSON, dekoder JWT, generator haseł, kalkulator TDEE, generatory CSS. Bez rejestracji, bez reklam. Wszystko przetwarzane w przeglądarce.
Nederlands: Gratis online tools voor ontwikkelaars en ontwerpers. JSON-formatter, JWT-decoder, wachtwoordgenerator, TDEE-calculator, CSS-generatoren. Geen registratie, geen advertenties. Alles wordt in de browser verwerkt.
Svenska: Gratis onlineverktyg för utvecklare och designers. JSON-formaterare, JWT-avkodare, lösenordsgenerator, TDEE-kalkylator, CSS-generatorer. Ingen registrering, inga annonser. Allt bearbetas i webbläsaren.
Čeština: Bezplatné online nástroje pro vývojáře a designéry. JSON formátovač, JWT dekodér, generátor hesel, TDEE kalkulačka, CSS generátory. Bez registrace, bez reklam. Vše zpracováno v prohlížeči.
Română: Instrumente online gratuite pentru dezvoltatori și designeri. Formatator JSON, decodor JWT, generator de parole, calculator TDEE, generatoare CSS. Fără înregistrare, fără reclame. Totul procesat în browser.
Українська: Безкоштовні онлайн-інструменти для розробників і дизайнерів. JSON форматер, JWT декодер, генератор паролів, калькулятор TDEE, CSS генератори. Без реєстрації, без реклами. Все обробляється у браузері.