Hash Generator Online
Compute MD5, SHA-1, SHA-256, SHA-384, and SHA-512 of text or any file — privately in your browser.
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How to generate a hash online
Switch to Text and type/paste content — all five hashes recompute as you type. Or switch to File, drop any file, and ToolChop hashes the raw bytes. SHA-1, SHA-256, SHA-384, and SHA-512 use the browser's native Web Crypto API (hardware-accelerated). MD5 runs in pure JavaScript so it is available without needing a server.
When to use which hash
- SHA-256 — the modern default. Use for integrity checks, JWT signatures, code signing, checksum files.
- SHA-512 — higher security margin; faster than SHA-256 on 64-bit CPUs for large inputs.
- SHA-384 — used by some TLS suites and EU-government profiles.
- SHA-1 — legacy interop only. Broken against collision attacks; do not use for new security work.
- MD5 — non-security uses: ETags, deduplication, content addressing where there is no adversary.
What you can do
- Hash UTF-8 text or any file
- All five algorithms in one screen, recomputed on every change
- Matches the output of
md5sum,sha256sum,openssl dgst - Native Web Crypto for SHA; tight pure-JS for MD5
- Copy any digest with one click; no upload
Frequently asked questions
How do I generate an MD5 or SHA-256 hash online for free?
Switch to the Text tab and type/paste content, or switch to File and drop any file. All five hashes — MD5, SHA-1, SHA-256, SHA-384, SHA-512 — compute and display instantly. Click Copy next to the one you need. No account, no upload.
Does ToolChop upload my data?
No. Hashing runs entirely in your browser using the Web Crypto API (SubtleCrypto for SHA family) and a small pure-JS MD5. Your text or file never leaves your device — that is essential for hashing confidential files, where a server-side hasher would defeat the privacy purpose.
What is the difference between MD5, SHA-1, and SHA-256?
All three are cryptographic hash functions that take any input and produce a fixed-length fingerprint. MD5 (128 bits) and SHA-1 (160 bits) are old and broken for collision resistance — never use them for security. SHA-256 (256 bits) is the modern default for integrity checks, signed payloads, and JWT signing. SHA-384 / SHA-512 are larger variants for higher security margins.
Why is MD5 still useful if it is broken?
MD5 is broken against deliberate collision attacks — an attacker can craft two different files with the same MD5 hash. But it is still fine for accidental-corruption checks, deduplication, ETags, and content-addressed storage where there is no adversary trying to forge a collision. Many CI systems and CDNs still emit MD5 ETags.
Does the hash include filename or only the file contents?
Only the file contents. Two files with the same bytes but different filenames produce the same hash — which is how checksum verification works (you check the hash, not the filename).
Is the hash the same as what `md5sum` or `sha256sum` on Linux produces?
Yes. The output is the canonical lowercase hex digest that matches the GNU coreutils tools and openssl dgst. So if a project publishes `sha256: abcd...`, you can verify a downloaded artifact here and get the same string.
Is there a file size limit?
Only your browser's memory. We have hashed multi-GB files in modern Chrome via SubtleCrypto's streaming-friendly digest path. For very large files the read step is the slow part; SHA-256 of a 1 GB file usually completes in under 10 seconds on a modern laptop.
Why are some hashes faster than others?
SHA-256 and friends use the browser's native Web Crypto implementation, which runs on a background thread at hardware-accelerated speed. MD5 here runs in pure JavaScript, which is slower for large files but still reasonable up to ~100 MB. SHA-256 is both faster and more secure — prefer it.
Is hashing the same as encryption?
No. Hashing is one-way: you cannot recover the original input from the hash. Encryption is two-way: you can decrypt with the right key. Hashes are used for integrity and identity, encryption for confidentiality.
Why does the same input always produce the same hash?
By design. Hash functions are deterministic — given the same bytes in, they always produce the same bytes out. That is how checksum verification works: you compare your local hash to the publisher's.
Can I use these hashes for password storage?
No. Plain SHA-256 or MD5 of a password is dangerously fast to brute-force. Use a slow KDF designed for passwords — bcrypt, scrypt, or Argon2 — with a per-user salt. SHA-256 is the right choice for verifying file integrity, not for storing passwords.
Why does my hash differ from another tool's output?
Three usual causes. (1) Whitespace or BOM: an extra newline at the end of your text changes the hash. (2) Line endings: CRLF (Windows) and LF (Unix) hash differently. (3) Encoding: this tool hashes UTF-8 bytes; older tools might hash UTF-16 or Windows-1252. Make the bytes identical and the hashes will match.
Why use ToolChop instead of an online hasher that uploads my file?
Privacy. The whole point of a file hash is integrity — uploading to a third-party first is exactly the threat model you are trying to address. ToolChop hashes locally so the data never leaves your machine.