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Online Hash Converter

Generate common hashes from text or a file, or convert an existing hash between hex and Base64. Everything runs locally in your browser (no uploads).

Category: Developer · URL: /tools/online-hash-converter.html
Treat input as
Algorithms
If a file is selected, it is hashed instead of the text box. For very large files, browser memory may be a limit.
Hex bytes mode ignores spaces/newlines and optional 0x prefixes. Convert mode decodes the input then re-encodes it.
Local-only. No network requests.
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Privacy: runs locally in your browser. No uploads, no tracking scripts.

How to use

Choose whether you want to generate a hash or convert an existing hash format.

  1. Select Generate hash (text/hex/file) or Convert hash format (hex ↔ Base64).
  2. Pick the algorithms (for generation) and the output encoding (hex/Base64).
  3. Click Compute, then copy the result.
Keywords this page targets (natural cluster): online hash converter, hash generator online, sha256 hash online, sha1 hash generator, md5 hash generator online, sha512 hash calculator, sha384 hash generator, convert hash hex to base64, convert hash base64 to hex, hash text to sha256, hash file sha256 online, checksum calculator online, digest generator, utf8 string to sha256, hex string to bytes hash, md5 checksum calculator, sha256 hex output, sha256 base64 output, client side hash tool, web crypto digest tool
Secondary intents covered: Generate SHA-256/SHA-512 hashes for API signatures, Create checksums to verify file integrity, Convert an existing digest between hex and Base64, Hash raw bytes provided as a hex string, Compare two hashes quickly by copying consistent output, Produce multiple algorithms at once for compatibility checks, Debug encoding issues (UTF-8 vs raw bytes) when hashing

FAQ

Is this online hash converter uploading my data?

No. Hashing and conversions run locally in your browser; the tool does not make network requests.

Which algorithms are supported?

MD5, SHA-1, SHA-256, SHA-384, and SHA-512 are supported (SHA-* via Web Crypto; MD5 via local JavaScript).

Can I hash a file (not just text)?

Yes—choose a file and click Compute. The file is read locally and hashed in the browser.

What does “Hex bytes” input mode do?

It interprets your input as raw bytes written in hex (e.g. de ad be ef) instead of UTF-8 text before hashing.

How do I convert a hash from hex to Base64 (or Base64 to hex)?

Select “Convert hash format”, paste the digest, choose the output encoding, then click Compute.

Why do my hash results differ from another tool?

Most differences come from input encoding (UTF-8 text vs raw bytes/hex), hidden newlines, or hashing a file vs its filename/text.

Is MD5 safe for passwords or security?

No—MD5 (and SHA-1) are not recommended for security-sensitive uses; prefer modern approaches (e.g., salted password hashing like bcrypt/Argon2) and SHA-256+ for integrity.