Free & Open Source
Every dev tool.
One app.
36+ essential developer tools — JSON formatting, UUID generation, JWT decoding, and more — all running locally on your machine. Fast, private, offline.
JSON Formatter
Input
1{
2"name": "DevToolbox",
3"version": "0.1.0",
4"tools": 36,
5"free": true
6}
Output — Formatted
1{
2"name": "DevToolbox",
3"version": "0.1.0",
4"tools": 36,
5"free": true
6}
✓ Valid JSON · 6 lines
36+ Tools
Everything you reach for,
Everything you reach for,
already here.
From quick conversions to deep inspections — every tool a developer needs, in one fast, native app.
JSON Formatter
Format, validate, and minify JSON with syntax highlighting
Formatting
UUID Generator
Generate v4 UUIDs, bulk create, and validate formats
Generator
Base64 Encoder
Encode and decode Base64 strings and files instantly
Encoding
JWT Decoder
Decode, inspect, and verify JSON Web Tokens
Crypto
Hash Generator
SHA-1, SHA-256, SHA-512, MD5, and HMAC generation
Crypto
Regex Tester
Test and debug regular expressions with live matching
Text
Color Converter
Convert between HEX, RGB, HSL, and preview colors live
Converter
Timestamp Converter
Unix epoch to human-readable and back with timezone support
Date & Time
URL Encoder
Encode, decode, and parse URL components and query strings
Encoding
YAML ↔ JSON
Seamlessly convert between YAML and JSON formats
Converter
Markdown Preview
Live rendering with GFM support, tables, and code blocks
Text
QR Code Generator
Generate QR codes from text, URLs, and custom data
Generator
Plus 24 more tools — SQL Formatter, Diff Checker, Bcrypt, CSV ↔ JSON, Password Generator, and more
Why DevToolbox
Built different.
No accounts. No telemetry. No cloud. Just tools that work, instantly.
Works Offline
Every tool runs locally with zero network dependency. No internet? No problem.
Privacy-First
Your data never leaves your machine. No analytics, no tracking, no accounts.
Blazing Fast
Rust-powered backend with native performance. Tools respond in milliseconds.
Free Forever
No premium tiers, no feature gates, no subscriptions. Every tool is free.
Base64 Decode
Decode incoming payload
JSON Format
Pretty-print the structure
Hash (SHA-256)
Generate integrity hash
Copy to Clipboard
Output ready to paste
Pipeline Builder
Chain tools into
Chain tools into
custom workflows.
Connect any combination of tools into reusable pipelines. Decode, transform, validate, and hash — all in a single flow with the visual node editor.
Drag-and-drop visual node editor
Chain any tools in any order
Save and reuse your workflows
Smart auto-detection of data formats
Ready to streamline
your workflow?
Download DevToolbox and get 36+ essential developer tools, all running natively on your machine.