UOhMyUnit

Developer Tools

Everyday developer helpers — JSON formatter and validator, Base64 / URL encoders, hash generator, JWT decoder, Markdown to HTML preview. All in-browser.

A small toolbox of dev utilities that load instantly and run in your browser. JSON beautify/validate, Base64 and URL encode/decode, hashes, JWT inspection, and Markdown preview — no signup, no upload.

Tools in this category

JSON Formatter

Beautify, minify, and validate JSON

Base64 Encoder/Decoder

Text ↔ Base64, with URL-safe option

URL Encoder/Decoder

encodeURIComponent / encodeURI

Hash Generator

SHA-1, SHA-256, SHA-512 (and MD5) for text or files

JWT Decoder

Inspect header and payload (no verification)

Markdown → HTML

Live preview with sanitized output

What is in this category?

  • JSON Formatter — pretty-print or minify, with a clear line:col error on invalid input.
  • Base64 — text ↔ base64 with proper UTF-8 + URL-safe option.
  • URL Encoder — encodeURIComponent and encodeURI for query strings or full URLs.
  • Hash Generator — SHA-1, SHA-256, SHA-512 (plus MD5 fallback) for text or files.
  • JWT Decoder — split, base64URL-decode, and pretty-print header + payload (no signature verification).
  • Markdown to HTML — live preview using marked + DOMPurify for XSS-safe rendering.

Part of the OhMy* tools family

PDF

OhMyPDF

PDF tools — merge, split, compress, rotate

QR

OhMyQR

QR codes & barcodes (vCard, WiFi, bulk CSV)

GIF

OhMyGIF

GIF tools — resize, compress, GIF↔MP4

ICO

OhMyIcon

Favicons & app icons in every size