Free developer tools for JSON, Base64, JWT & more
theproductguy.in is a library of 242 free client-side developer tools for everyday engineering, product, writing, image, PDF, security, color, and data tasks. The tools run in your browser, so pasted text, local files, generated passwords, decoded tokens, images, PDFs, and working drafts do not need to leave your device. There are no accounts, no uploads, and no server-side processing for normal tool use.
Use the site when you need a quick JSON formatter, Base64 encoder, JWT decoder, regex tester, URL encoder, UUID generator, markdown converter, color picker, image compressor, PDF utility, password generator, or text cleanup tool without opening a terminal or sharing data with a SaaS app. Each tool is built as a static page with crawlable metadata, clear privacy copy, structured data, and focused help text for people and search engines.
Popular free developer tools
Start with the most-used utilities or browse the full directory. These links are available in the raw HTML so search crawlers and AI crawlers can understand the tool collection before JavaScript hydrates the app.
- JSON Formatter
- Base64 Encoder / Decoder
- JWT Decoder
- Regex Tester
- URL Encoder
- Word Counter
- UUID Generator
- Markdown to HTML
- Color Picker
- Image Compressor
- PDF Merger
- Password Generator
Browse by workflow
The catalog covers developer formats, text processing, dates and numbers, colors, images, security, utility workflows, PDFs, and reading tools. Every route is generated from the registry, included in the sitemap, and baked as static HTML for Cloudflare Pages.
- All developer tools
- Product and developer articles
- Developer Tools
- Text Tools
- Numbers & Dates Tools
- Color Tools
- Image Tools
- Security & Crypto Tools
- Utility Tools
- PDF Tools
Privacy, security, and learning
Minal Goel built theproductguy.in as a practical toolbox and writing hub for developers, technical professionals, and product managers. The site also publishes guides on client-side tooling, JWT security, benchmarks, data formats, and workflow decisions so users can understand not just what a tool does, but when it is safe and useful. That context helps people choose the right browser utility for quick work, sensitive data, and repeatable technical workflows.