xiry.

Development · Web app

Jam Dev Utilities

Free, open-source, and ad-free client-side developer utility tools

From the Xiry library · Updated 3 October 2026

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Jam Dev Utilities is a curated suite of free, open-source web tools created by the Jam team for everyday programming tasks. It covers data formatting, conversions, encoding, and debugging without the clutter or privacy concerns of ad-heavy converter sites. Everything runs quickly in the browser, keeping sensitive strings and payloads on your local machine.

What it's for

  • Convert between data formats like CSV, TSV, YAML, XML, and JSON
  • Encode or decode Base64 strings, images, and URL components
  • Parse and inspect JSON Web Tokens (JWT) or HAR network logs
  • Convert Unix timestamps to human-readable dates
  • Generate secure hashes, random UUIDs, or passwords directly in the browser

Features

  • Ad-free and open-source browser interface
  • Fast command palette search (CMD + K)
  • Comprehensive JSON tools including formatters, validators, and converters
  • Security utilities like JWT parser, hash generator, and file integrity checkers
  • Web design helpers including HEX to RGB, CSS unit converters, and WCAG contrast checker
  • Image tools including WebP conversion, resizing, and Base64 encoding/decoding
  • Client-side processing to ensure data privacy

Pricing

Free and open source

Details

Type
Web app
Category
Development
Topic
Developer Utilities
Open source
Yes
Platforms
Web
For
Software developers, QA engineers, and web designers looking for quick, ad-free utilities.
Alternative to
CyberChef, DevToys, Transform Tools
Tags
developer tools, converters, formatters, json, utilities, open source

Why it was saved

  • @jamdotdev, 15 August 2024: Replaces ad-heavy, clunky developer utility sites with fast, clean, private client-side converters that keep data on your device.

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Updated