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Hash Formatter

Format, minify, and validate hash strings with clear, reversible formatting options. Paste data, import a file, batch-process one hash per line, then copy or download the result with actionable diagnostics.

Category: Developer · URL: /tools/hash-formatter.html
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Diagnostics
Privacy: runs locally in your browser. No uploads, no tracking scripts.

How to use

To use the Hash Formatter:

  1. Paste hashes into the input (one per line) or import a text file.
  2. Toggle Reversible Mode to preserve original case/prefixes while adding separators.
  3. Click Run to format and validate.
  4. Use Copy to copy output or Download to save it as a file.

If something looks wrong, check the diagnostics panel for line-level errors and suggestions (e.g., odd-length hex, invalid Base64 padding, unexpected characters).

Keywords this page targets (natural cluster): Hash string formatter, Hash formatter online, Format and minify hash, Hash pretty print tool, Batch hash formatting, Hash validation online, MD5 formatter, SHA256 formatter, SHA512 formatter, UUID formatter, Hex formatter, Base64 validator
Secondary intents covered: How to format a hash, How to minify a hash string, Validate hex hash length, Convert UUID to compact form, Batch format hashes from a file, Copy and download formatted hashes

FAQ

What is a hash formatter?

A hash formatter is a utility that makes hash strings easier to read and review by adding consistent grouping, removing unwanted separators, and validating common formats (like hex and Base64).

What does Reversible Mode do?

When enabled, the formatter preserves the original core characters (including hex case and any 0x prefix) while adding readability separators. You can always get the compact form back by removing spaces/separators.

Can I process multiple hashes at once?

Yes. Paste one value per line (or comma-separated values), or import a text file. The tool formats each item and outputs one formatted value per line.

Does it validate common hash lengths like MD5 and SHA-256?

Yes. For hex strings, the diagnostics include informational hints when the length matches common hashes (MD5, SHA-1, SHA-256, SHA-512) and errors for invalid cases like odd-length hex.

How do I download the result?

After running the formatter, click Download to save the output as a .txt file.

How do I copy the formatted output?

Click Copy to copy the output to your clipboard. If clipboard permissions are blocked, select the output text manually and copy it.

What file types can I import?

Any plain-text file is supported (such as .txt, .log, or .csv). Drag & drop or use the file picker.

What diagnostics will I see when something is wrong?

The diagnostics panel reports line/column location, a clear error message, and suggestions (for example: odd-length hex, invalid UUID length, or Base64 padding errors).