Developer

Developer Tools Hub — JSON, JWT, HTML & DNS Utilities

Free browser utilities for JSON formatting, JWT decoding, HTML beautification, text diff, URL encoding, and DNS lookup.

Published June 1, 2025 · 1 min read

Written by Ethan Brooks · Editor-in-Chief & Product Lead

Reviewed by James Cole

Last reviewed January 15, 2026 · Editorial policy

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Developer utilities in one place

RatPDF's developer hub covers JSON formatting, JWT decoding, HTML beautification, text diff, URL encoding, binary conversion, DNS lookup, and Base64 image encoding — plus thousands of long-tail SEO pages for specific debugging scenarios.

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PDF pipeline tools: HTML to PDF · Blog: JSON formatter for API debugging · Guides hub: developer tool guides

Sources & references

Primary references used when researching and fact-checking this guide. See our editorial methodology.

Adobe PDF Reference — encryption — Adobe
PDF password protection and encryption standards (ISO 32000).
Ghostscript documentation — PDF settings — Artifex Software
Compression level behavior and PDF output settings.