The premise
Developer utility sites treat the tool as the whole product. You arrive from a search, paste a string, copy the result, leave. It works. It also means the same person returns next month with the same confusion, because nothing on the page addressed why the thing behaved as it did.
DevForgio pairs each tool with the explanation the other sites leave out. Why Base64 output is a third larger than the input. Why a ten-digit timestamp is seconds and a thirteen-digit one is milliseconds. Why a /24 gives 254 hosts rather than 256. Why your accented characters came back mangled somewhere else.
The measure of success is that you stop needing us for that particular thing.
How these are built
- Client-side only. Plain JavaScript on the page you already loaded. No backend, no network requests, no logging, no storage. Open your browser's network tab and watch nothing happen while you type.
- Correct on the edge cases. The Base64 encoder handles Unicode properly instead of calling btoa() and throwing on the first emoji. The subnet calculator gets /31 and /32 right instead of reporting zero or negative usable hosts. The base converter uses BigInt rather than silently losing precision past 2⁵³.
- Explicit about failure. When something cannot be done — verify a JWT signature, handle IPv6, transliterate a script with no ASCII equivalent — the tool says so rather than returning a confident wrong answer.
- No dependencies. Each page is one self-contained file. No frameworks, no external fonts, no third-party scripts loading before the content.
- Slowly. Five finished tools beat thirty half-done ones. They ship when they are correct, not when they run.
Why client-side is not just a preference
The strings developers paste into utility sites are routinely sensitive: bearer tokens, internal hostnames, connection strings, customer identifiers, fragments of production data. A tool that posts that to a server is asking for trust it has not earned and does not need, because none of these operations require a server. Doing the work in the browser removes the question entirely — there is nothing to leak because there is nothing to send.
This also means the tools work offline once loaded, work behind a corporate proxy, and cannot be degraded by our server going down.
What we are not
DevForgio is not a security product. The Base64 tool encodes; it does not protect. Nothing here should be treated as a substitute for proper cryptography, and no output should go into production without verification. See the disclaimer.
We are also not a reference authority. Where a page describes an RFC or a language behaviour, the specification itself is authoritative. We aim to be accurate and we correct errors quickly, but if this site and RFC 4648 disagree, RFC 4648 is right.
Funding
Display advertising, placed so it never covers a result. No sponsored tools, no affiliate links dressed as recommendations, no paid placements in the explanatory text. Nothing you paste is used for ad targeting, because none of it is ever transmitted. The privacy policy sets out exactly what advertising partners can and cannot see.
What is queued
Twenty-seven more tools, roughly in order: JSON formatter and validator, regex tester, JWT decoder, hash generator, diff checker, case converter, colour converter, CSV/JSON conversion both ways, Markdown to HTML, cron expression parser, HTML entity encoder, query string parser, minifier, beautifier, YAML and XML handling, SQL formatter, string escaper, and an HTTP status reference. Requests through the contact form reorder the queue.
Corrections
If something here is wrong — a tool producing bad output, or an explanation that misstates a specification — tell us and it gets fixed ahead of everything else. Use the contact form or corrections@devforgio.com, and include the exact input you used.