About Us

MiniConvert started as a folder of throwaway HTML files on a laptop. I'm a backend engineer who spent too many years pasting session tokens and API secrets into whatever "free online Base64 decoder" ranked first on Google, and then lying awake wondering which of those sites had just logged my input. One evening I decoded a JWT on a sketchy tool, watched the network request fire off to a server I'd never heard of, and decided I'd rather build my own utilities than keep gambling with credentials that guard real systems.

That's the mission this corner of MiniConvert is built around: encoding, hashing and crypto tools that a developer or security engineer can actually trust, because they never phone home. Every calculator here — Base64 and Base64URL, URL encoding, MD5, SHA-256, the Multi-Hash and HMAC generators, the JWT decoder, the file checksum verifier — runs entirely in your browser. Your input is computed in memory and never transmitted anywhere. You can prove it yourself by opening your network tab while you work; that transparency is the point, not a feature I'm asking you to take on faith.

I care about getting the details right, because the details are what make these tools safe. That means correct UTF-8 handling so Unicode doesn't silently corrupt, honest labelling about where MD5 and SHA-1 are and aren't appropriate, and encoding modes that match the actual specifications instead of a convenient approximation. When something behaves oddly, I want to know — a webhook HMAC that won't match, a token that decodes strangely, a checksum tool that trips over a large file. Feedback from people doing real work is how each utility gets sharper.

MiniConvert isn't trying to be a bloated all-in-one dashboard. It's a set of fast, single-purpose, developer-first tools that respect your time and your secrets in equal measure. If a tool saved you a debugging headache, or if you have found an edge case that deserves fixing, I'd genuinely like to hear about it. Reach me directly at [email protected].