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Developer Tools
Powerful browser-based utilities for developers — no signup, no tracking, completely free. Everything runs in your browser.
Cron Expression Explainer
Parse and understand any cron expression. See the next 5 execution times and generate common patterns instantly.
CORS Error Debugger
Diagnose CORS issues instantly. Get ready-to-use fix code for Express, Nginx, Apache, Laravel, and Django.
JWT Decoder & Inspector
Decode any JWT token client-side. Inspect header, payload, claims, and expiry countdown — your token never leaves the browser.
Docker Compose Generator
Select your services and generate a complete docker-compose.yml with volumes, networks, and environment variables.
Regex Tester
Test regular expressions in real-time with live highlighting, match groups, and plain-English explanations of each part.
Git Command Finder
Describe your Git situation and get the exact command. 20+ scenarios with explanations and destructive-action warnings.
HTTP Status Code Explorer
Complete searchable reference for all HTTP status codes with usage examples and code snippets in Express and Python.
SemVer Calculator
Calculate semantic version bumps and validate version ranges. Understand major, minor, and patch increments instantly.
AI Token Counter
Count tokens for GPT-4o, Claude 3.5, Gemini 2.0, and 10+ AI models. Compare context window usage and estimate API costs instantly.
.ENV File Inspector
Validate .env format, detect exposed API keys and secrets, and generate a safe .env.example for your team. Zero data sent.
Base64 Encoder & Decoder
Encode and decode Base64 strings instantly. Supports UTF-8 text, URL-safe Base64, and data URL generation.
JSON Formatter & Validator
Format, validate, and minify JSON with syntax highlighting. See errors with line numbers and pretty-print with custom indentation.
URL Encoder & Decoder
Encode and decode URLs with special characters, query parameters, and Unicode. Parse any URL into its components.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes instantly. Compare hashes and verify data integrity in your browser.
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What is devbit.dev?
devbit.dev is a collection of free, browser-based developer tools designed to save you time and make debugging easier. Whether you need to decode a JWT token, understand a cron expression, debug a CORS error, or find the right Git command for your situation — we have you covered.
All tools run entirely in your browser. No data is ever sent to a server, making them safe for sensitive tokens and configuration. No registration is required and all tools are completely free.
Why use devbit.dev?
- Privacy-first: All processing happens client-side in your browser. Your JWT tokens, regex patterns, and Docker configs never leave your machine.
- No signup required: Open any tool and start using it immediately — no account, no email, no credit card.
- Fast and lightweight: Built with vanilla HTML, CSS, and JavaScript — no heavy frameworks, loads in under a second.
- Developer-focused: Each tool is built specifically for the problems developers face daily.