DevSpeedTools is a collection of free, browser-based developer utilities for converting, formatting, validating, encoding, and transforming data. Every tool runs entirely in your browser — your data is never uploaded to a server. Whether you need to convert YAML to JSON, format a messy JSON file, decode a JWT token, or generate a strong password, you can do it here without signing up or installing anything.

The project was built for developers who want fast, private tools that just work. No ads tracking your input, no accounts to create, no data leaving your machine. Open a tool, paste your data, get your result.

How all tools work.

Every tool on DevSpeedTools processes data locally using JavaScript. When you paste YAML into the converter, the parsing and conversion happens in your browser's JavaScript engine. No network request is made with your data. You can verify this by opening your browser's DevTools and checking the Network tab — you won't see any requests carrying your input.

This client-side approach means the tools work offline once the page has loaded, process data instantly without server latency, and keep your sensitive information private. Whether you're working with API keys, passwords, proprietary configuration files, or personal data, it never leaves your device.

Tool categories.

YAML tools

Convert, format, validate, diff, sort, flatten, and manipulate YAML files. Works with Kubernetes manifests, Docker Compose, CI/CD configs, and application settings.

JSON tools

Format, validate, minify, and transform JSON data. Perfect for API responses, configuration files, and debug output.

Converters

Move data between formats: YAML to JSON, CSV to YAML, TOML to YAML, properties to YAML, and more. All conversions happen instantly in your browser.

Encoders & decoders

Base64 encode/decode, URL encode/decode, HTML entity escaping, JWT decoding, and markdown-to-HTML rendering. Essential utilities for web development.

Generators

Generate UUIDs, passwords, passphrases, cron expressions, hashes (MD5, SHA-256), and lorem ipsum text. All generators use cryptographic randomness.

Reference

Quick-lookup references for HTTP status codes, MIME types, and other developer documentation. Searchable and filterable.

About the tools directory.

The DevSpeedTools directory organizes every available utility by category, making it easy to find the right tool for your task. Whether you need to convert data between formats, validate configuration files, or generate test data, the directory provides a single entry point. Each tool card shows a brief description, badges indicating key features (like "client-side" or "no upload"), and a direct link to start using it immediately.

All tools share a consistent design philosophy: process data entirely in your browser, never upload sensitive information, and provide instant results. This means you can use any tool offline after the initial page load, and your data never leaves your machine. The search and filter features let you quickly narrow down the full list by keyword or category, so you spend less time searching and more time working.

The directory is regularly updated with new tools as developer needs evolve. Each category represents a common workflow — YAML and JSON tools handle configuration management, converters bridge format gaps, encoders and decoders handle data transformation, and generators produce random or structured output for testing. If you frequently switch between these tasks, bookmarking the tools page gives you quick access to the full collection.