Free DeveloperUtilities & Tools
Fast, free, and privacy-focused tools for developers. All processing happens in your browser—no data leaves your device.
Explore the Toolbox
Pick a utility to get started in seconds.
JSON Formatter
Format, validate, and beautify JSON data instantly
Base64 Encoder
Encode and decode Base64 strings with ease
Diff Checker
Compare text differences with highlighted changes
UUID Generator
Generate unique identifiers (v4) instantly
Hash Generator
Generate MD5, SHA-1, SHA-256 hashes
Password Generator
Create strong, secure passwords instantly
Regex Tester
Test and debug regular expressions live
URL Encoder
Encode and decode URL components
JWT Decoder
Decode and verify JSON Web Tokens
Timestamp Converter
Convert Unix timestamps to human dates
QR Code Generator
Create QR codes for URLs, WiFi, and vCards
Color Picker
Pick colors and convert HEX, RGB, HSL
Lorem Ipsum Generator
Generate placeholder text for designs
Free Developer Tools & Utilities Online
DevUtil is a fast toolkit for everyday developer tasks. Each tool runs in your browser, so data stays on your device. You can format JSON, encode Base64, generate UUIDs, and test regex patterns without installing anything. You can also generate secure passwords or fast placeholder text for mockups. The tools load fast and work well on mobile.
Use DevUtil as a lightweight hub for common workflows. Format a JSON response, then jump to the URL encoder to clean up query strings. Decode a JWT and open the JSON formatter to inspect the payload. These links keep your flow moving and reduce copy-paste errors.
The toolkit focuses on simple, single-purpose utilities. Each page has clear actions, practical defaults, and instant results. If you need a quick formatter, converter, or validator, pick a tool below and get started in seconds.
JSON Formatter · Base64 Encoder · UUID Generator · Hash Generator · Regex Tester · URL Encoder · JWT Decoder · Timestamp Converter · Password Generator · Lorem Ipsum Generator · QR Code Generator · Color Picker
Why Choose DevUtil?
Privacy First
All processing happens locally in your browser. Your data never touches our servers.
Lightning Fast
Instant results with no server roundtrips. Tools load and process data in milliseconds.
Always Free
No subscriptions, no hidden fees, no account required. Use all tools completely free.