Empowering developers, students, and professionals with high-performance, browser-side utilities. Zero server-side logs. Zero latency. Total data sovereignty.
Every utility is built with the highest standards of performance and privacy, operating 100% on your device.
Format, validate, and convert JSON in your browser: four tools for API responses, syntax errors, and converting JSON to TypeScript or CSV.
Encode, decode, and inspect Base64 strings, percent-encoded URLs, and JWT tokens, all processed locally with nothing sent to a server.
Format and minify HTML, beautify XML and SOAP responses, and preview Markdown live, browser-side tools for cleaning up your markup.
Shrink oversized PDFs, combine multiple files into one, or split out specific pages, three browser-side PDF tools with no uploads and no file size games.
Resize a photo to official passport and visa specifications for any country, then tile it onto a print-ready sheet, both entirely in your browser.
Build an ATS-friendly resume and a matching cover letter, free with no signup, no watermark, and no trial that quietly turns into a subscription.
Test regular expressions, format SQL queries for readability, and generate collision-safe UUIDs, three everyday tools in one place.
The most-used utilities across every category, one click away.
Pretty print and beautify messy JSON strings.
Reduce PDF file size locally without server uploads.
Build an ATS-friendly resume with local autosave. No signup, no watermark.
Crop and resize ID photos to official country specifications.
Decode and inspect JSON Web Tokens locally.
Test and debug regular expressions visually.
DevToolHub was founded on a simple realization: the tools we use shouldn't be a liability. Most "online formatters", "PDF tools", and "converters" act as a middleman, collecting sensitive data under the guise of convenience. We've eliminated that risk by building a **Zero-Trust Engineering Hub**.
We leverage modern browser APIs (Web Workers, V8, WebCrypto) to ensure tools run at near-native speeds. No server-side round-trips means zero latency for your workflow.
Your secrets stay on your hardware. We provide the logic; you provide the environment. This ensures compliance with modern security standards like SOC2 and HIPAA.
Stop switching between dozens of fragmented sites. DevToolHub provides a consistent, professional-grade interface for all your daily data manipulation needs.
Heavy computation—like formatting a 100MB JSON file or bulk-generating UUIDs—is offloaded to background threads, ensuring a smooth UI.
We use high-performance engines that power modern browsers, guaranteeing that your JSON or SQL formatting is strictly compliant.
Deep dive into data validation, encoding schemes, web performance, and security standard practices.
JSON has become the universal language of the web. Learn how to handle complex structures with professional-grade precision.
Don't leak your API keys to unknown servers. Learn why 'Local-First' tools are the only safe way to process sensitive data.
Every millisecond counts. Discover how stripping unnecessary bytes from your code can boost your search engine visibility.
Join thousands of users who have made the switch to privacy-first web utilities. Bookmark DevToolHub and never paste your data into a suspicious server again.