189+ free tools · zero signup · 100% in your browser
Developer tools that
just work.
Format, convert, generate, encode, hash and validate — 189+ utilities built for real workflows. Open one, paste your data, done.
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Why choose us
Built to the standard you actually need
Instant, client-side
Everything runs locally in your browser using WebAssembly and native APIs. No server round-trips — results appear as you type.
100% private
Your code, data, secrets and files never leave your device. Nothing you paste into a tool is logged, stored or transmitted.
189+ tools covered
From JSON formatters and UUID generators to AES encryption, CSS playgrounds, diagram editors and mock data — every common workflow is here.
Professional quality
Powered by industry-standard libraries: Prettier, Terser, Dart Sass, WebCrypto, clang-format (WASM), gofmt (WASM), Ruff (WASM) and more.
Always up to date
Tools are continuously updated to support the latest language standards, framework APIs and file formats. No stale demos.
Zero friction
No account, no email, no subscription, no cookie consent wall. Open a tool, use it, close it. The way developer tools should be.
About Alpha DevTools Platform
Alpha DevTools Platform is a free, open-source collection of 189+ browser-based utilities built for developers, designers and data engineers. Every tool runs entirely client-side using JavaScript and WebAssembly — your data never leaves your device. No account, no subscription, no ads, no rate limits. Open a tool, paste your data, get your result.
Features
- ✓JSON — formatter, minifier, validator, diff viewer, JSONPath tester, JSON to YAML/XML/CSV/TypeScript/Python/Go/Rust/Kotlin converters and schema generators
- ✓SQL — formatter, minifier and multi-dialect SQL conversion (MySQL, PostgreSQL, Standard SQL)
- ✓CSS & UI — CSS generators (shadows, glassmorphism, gradient text), button designer, clip-path editor, colour palette, SVG generators, icon studio and HTML/CSS/JS playgrounds
- ✓Security — password generator, bcrypt/Argon2 hasher, AES-256/ChaCha20 encryption, JWT decoder, HMAC/SHA/MD5 hasher, SSH/RSA key generator
- ✓Formatters — format or minify 18+ languages: JSON, SQL, HTML, CSS, JS, TS, XML, YAML, CSV, Java, Python, Go, PHP, C#, GraphQL, TOML, Markdown and more
- ✓Converters — convert between JSON, YAML, TOML, XML, CSV, SQL, HTML, Base64, URL encoding and 30+ other format pairs
- ✓Code Generators — generate TypeScript interfaces, Python dataclasses, Go structs, Rust enums, Kotlin/Swift/C#/Java classes, Zod schemas, Prisma models from JSON
- ✓Diagrams — Mermaid flowchart/sequence/ER editor, draw.io-compatible export, architecture and decision tree diagrams
- ✓Developer Utilities — regex tester with live highlighting, diff viewer, JSONPath tester, HTML entities reference, UUID generator, HTTP request tester and more
- ✓Text & Numbers — string case converters, word counter, Lorem Ipsum, number base converter, Roman numerals, unit converter, hash tools
Common Use Cases
- Format a JSON API response, validate it against a schema and generate TypeScript interfaces — all without leaving the browser
- Generate a strong random password, hash it with bcrypt and verify the hash in the same session
- Convert a TOML config file to YAML or JSON for use across different deployment pipelines
- Build a CSS grid or Flexbox layout visually, then copy the exact CSS into your stylesheet
- Decode a JWT from an Authorization header to inspect its claims, issuer and expiry
- Convert a cURL command from API docs to Python requests, Go net/http or JavaScript fetch
- Generate 500 rows of realistic mock data as JSON or CSV to seed a development database
- Draw a system architecture or sequence diagram with Mermaid and export as SVG
Frequently Asked Questions
QAre all tools completely free?
Yes — all 189+ tools are free with no account, no subscription, no trial period and no paywalls. The platform is open source and will remain free.
QDoes my data get uploaded to a server?
No. Every tool processes data entirely in your browser using JavaScript and WebAssembly. Nothing you paste, type or import is transmitted to any server. Your data stays on your device.
QDo the tools work offline?
Most tools work offline once the page has loaded, because all processing runs client-side. A small number of tools that depend on external asset downloads (such as icon libraries) may need an initial connection.
QWhat categories are available?
There are 14 categories — Formatters, Converters, Generators, Security, CSS & UI, Diagrams, Encoders, Validators, Developer Utilities, Text Tools and more. All tools are also cross-referenced by technology at /tools/tech.
QWhich formatting libraries are used?
Tools use the same libraries professionals rely on: Prettier (JS/TS/HTML/CSS/JSON/Markdown), sql-formatter, Dart Sass, clang-format (via WASM), gofmt (via WASM), Ruff (Python via WASM), Terser and more — not hand-rolled approximations.
QCan I request a new tool?
Yes — the project is open source. Open an issue describing the tool you need or submit a pull request. New tools and improvements are added regularly.
See Also
- JSON FormatterFormat, validate and beautify JSON documents
- SQL FormatterFormat and minify SQL queries
- UUID GeneratorGenerate v1, v4 and v5 UUIDs instantly
- Password ToolsGenerate strong, cryptographically random passwords
- JWT DecoderDecode and inspect JWT tokens without a secret
- Regex TesterTest regular expressions with live match highlighting
- Base64 EncoderEncode and decode Base64 strings and files
- JSON to TypeScriptGenerate TypeScript interfaces from JSON
- Diff ViewerSide-by-side visual diff for text and code
- AES EncryptionEncrypt and decrypt data with AES-256 in your browser