Empowering developers, students, and professionals with high-performance, browser-side utilities. Zero server-side logs. No network round-trip. Your data stays on your device.
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.
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, WebCrypto) to ensure tools run at near-native speeds. Skipping the server round-trip means results appear as soon as your device finishes processing.
Your secrets stay on your hardware. We provide the logic; you provide the environment — your input is never transmitted to our servers. Using a client-side tool doesn't by itself satisfy SOC 2 or HIPAA; see our Privacy Policyfor exactly what each tool does and doesn't store.
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 the same JSON and SQL parsing logic that powers modern browsers and databases, so formatted output stays compatible with standard tooling.
Deep dive into data validation, encoding schemes, web performance, and security standard practices.
Changing careers means explaining a gap that isn't really a gap. Here's how to frame it with confidence.
A cover letter that just restates your resume gets skimmed and ignored. Here's how to write one that actually gets read.
No job history yet doesn't mean no resume. Here's how to build one that actually gets noticed.
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.