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Developer Utilities

Utilities

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MD5, SHA-1, SHA-2, SHA-3, RIPEMD-160, MD4, Whirlpool, Base64, ROT-13, Unix time, ASCII and HEX — all in one place.

Time, strings and encoding are computed in your browser. Hashes are computed on our server — the string is never stored or logged.

FAQ

Can MD5 be decrypted back into text?
No. A hash is a one-way transformation: the same string always produces the same digest, but recovering the string from the digest is mathematically impossible. Services promising “MD5 decryption” actually look your hash up in enormous precomputed tables. That works for simple passwords, which is exactly why MD5 has long been unsuitable for storing them — use bcrypt or Argon2 instead.
Which algorithm should I use today?
For file integrity, SHA-256 is the current standard. For passwords, general-purpose hashes are unsuitable altogether: you need bcrypt, scrypt or Argon2, which are deliberately slow. Keep MD5 and SHA-1 only where legacy compatibility demands it — practical collisions have been found for both, so they cannot be relied on for security.
How is Base64 different from encryption?
Base64 is an encoding, not encryption. It simply converts arbitrary bytes into a set of safe characters so they can travel as text: in an email, in JSON, in a URL. There is no key and anyone can decode it in a second. Hiding passwords or tokens in Base64 is therefore pointless — it is not protection, just a different way of writing the same data.
What is a Unix timestamp?
It is the number of seconds elapsed since 1 January 1970 UTC. The format is convenient because it does not depend on time zones or local date formats, which is why databases, APIs and logs use it. Watch the length: 10 digits means seconds, 13 means milliseconds. Our tool detects this automatically.
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