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100% client-side · nothing leaves your browser

Fast, free & reliable developer utilities

A focused toolbox for everyday encoding, formatting and debugging tasks. 100% free, runs entirely in your browser.

What is CodersUtility?

CodersUtility is a free collection of 95 browser-based developer tools — everything from a JSON formatter and Base64 encoder to a JWT decoder, regex tester, and hash generator. Every tool runs entirely in your browser: your data is processed locally with JavaScript and never uploaded to a server, so it stays private and works even offline once the page has loaded.

It is built for developers who want a fast, focused place to encode, format, convert, and debug without ads getting in the way, sign-ups, or pasting sensitive data into a third-party backend. Open a tool and it works immediately — no account, no limits, no tracking of what you paste.

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Frequently asked questions

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Yes, every tool is completely free with no usage limits, no subscriptions, and no sign-up required.

No account is required. Open any tool and start using it immediately — no login, no email, no sign-up.

All processing happens locally in your browser using JavaScript. Your data is never sent to any server or third party — it is completely private.

Yes. Once the page has loaded, all tools work without an internet connection since all processing runs client-side in your browser.

Over 90 tools across JSON, Encoding, Code, Text, Image, Number, Web / API, Security, Development, and Frontend / CSS categories, with more being added regularly.

Format and validate JSON, encode and decode Base64, JWTs, and URLs, generate and test regular expressions, convert timestamps and number bases, diff text, minify and beautify code, hash and encrypt strings, build CSS gradients and shadows, and much more. Everything runs in your browser, so it doubles as a fast scratchpad for everyday development tasks.

No. CodersUtility is a website — nothing to download, install, or update. It works in any modern browser on Windows, macOS, Linux, Android, and iOS, so you can use it on a work machine, a locked-down environment, or a phone without admin rights.

Yes. The interface is responsive and works on phones and tablets as well as desktops. The input and output panels stack on narrow screens so tools stay usable on small displays.

There is nothing to install, keep updated, or grant permissions to. Because everything runs client-side, you get the privacy of a local tool with the convenience of a bookmark — open a tab, get your result, and close it.

Yes. Use the text-size control in the header to scale the whole interface, and toggle light or dark mode from the theme menu. Each tool's code editor also has its own font-size stepper in the toolbar, and your choices are remembered on your next visit.

Yes. Because the tools are client-side, you can open your browser's developer tools and confirm that no network requests are made while you work. The only exception is a small number of clearly labelled "AI Powered" tools that call an external AI API — every other tool keeps your data entirely on your device.

Yes. New tools are added regularly based on what developers need. Use the Contact page to suggest a tool, request a feature, or report an issue with an existing one.