DevUtil is built and published by Adiram, an independent software studio building Android and web products people can trust. It exists for one reason: to give developers fast, single-purpose tools — JSON formatting, encoding/decoding, ID generation, and more — without signup friction or a wall of ads to click through first.
How the tools are built
Every tool is written directly against the relevant spec or standard, not copied from another site — RFC 4648 for Base32/Base64, RFC 9562 for UUIDs, the WCAG contrast formula, and so on. Where a format has edge cases (escaped quotes in CSV, ambiguous timestamps, malformed JSON), the tool is built to handle them correctly and say clearly when input is invalid, rather than fail silently.
How results are checked
Each tool is verified against reference implementations and known test vectors before shipping — for example, MD5 output checked against the RFC test vectors, UUID v7 checked for correct time-ordering, and round-trip conversions (RGB↔HSL, YAML↔JSON) checked for lossless accuracy. If you find a result you believe is wrong, tell us with the input you used and we will investigate and correct it.
Privacy by design
All processing runs entirely in your browser using JavaScript. The text, code, and files you paste or upload are never sent to our servers, because there is no server-side processing. See our privacy policy for what is collected.
How the site is funded
There is no charge to use the tools. Running costs are covered by display advertising. Ads never alter a tool's output.
Contact
Corrections, requests for new tools, or anything else: get in touch.