DIGITAL UTILITY KIT
Free Online Developer Tools
A compact toolbox for common development and debugging tasks. Many operations are performed entirely in the browser, making the tools useful for quick checks without a local setup.
Available tools
11 free tools in this category.
JSON Formatter & Validator
Format, minify and validate JSON instantly in your browser.
Open tool →developerURL Encoder & Decoder
Encode and decode URL components instantly in your browser.
Open tool →developerBase64 Encoder & Decoder
Encode Unicode text to Base64 or decode Base64 instantly.
Open tool →developerUUID Generator
Generate secure random UUID v4 identifiers instantly.
Open tool →developerUnix Timestamp Converter
Convert Unix timestamps to dates and dates back to epoch time.
Open tool →developerSHA Hash Generator
Generate SHA-256, SHA-384 and SHA-512 hashes locally.
Open tool →developerJWT Decoder
Decode JWT header and payload instantly without uploading the token.
Open tool →developerRegex Tester
Test JavaScript regular expressions against text instantly.
Open tool →developerColor Converter
Convert colours between HEX, RGB and HSL instantly.
Open tool →developerJSON to CSV
Convert JSON object arrays to CSV instantly.
Open tool →developerCSV to JSON
Convert CSV data to structured JSON instantly.
Open tool →Guides and explanations
Useful background for getting better results from these tools.
JSON vs CSV: Differences, Use Cases and Conversion Tips
Compare JSON and CSV, understand where each format works best, and avoid common problems when converting structured data.
Read guide →How to Format and Validate JSON Quickly
Learn how to spot invalid JSON, format compact data for reading and minify JSON again for transport or storage.
Read guide →Fast, free and privacy-focused
Digital Utility Kit is built around small tools that do one job well. Where browser technology allows it, processing happens locally on your device. No account is required to use these tools.