MD5, SHA-1 and CRC32 generator
Calculate classic fingerprints for legacy uses.
Generate MD5, SHA-1 and CRC32 fingerprints locally from text. These formats remain useful for compatibility, legacy systems and simple checks.
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Classic fingerprints
— — — MD5 and SHA-1 are kept for legacy uses. For a modern use, prefer the SHA generator.
Quick explanation
Paste text: MD5, SHA-1 and CRC32 are calculated automatically in the browser. The tool verifies its calculations with known reference values before displaying results.
Try this too
Need a modern SHA hash?
Use the SHA generator to produce SHA-256, SHA-384 and SHA-512 hashes.
Additional information
Classic fingerprints and compatibility
MD5, SHA-1 and CRC32 are still found in archives, legacy software, checksums, exports or technical documentation. This tool lets you calculate them quickly from text, directly in the browser.
The results are useful for comparing an expected fingerprint, recognizing an old format or checking an example, but they should not be mistaken for a recommended choice for modern security.
CRC32, MD5 and SHA-1
CRC32 is mainly used to detect accidental errors. It is not a cryptographic protection. MD5 and SHA-1 are historical hash functions, but they are no longer suitable for demanding security uses.
For a new project, prefer SHA-256 or SHA-512 with the modern SHA generator.
Calculation reliability
Before displaying a fingerprint, the tool tests its internal functions on the reference text abc. The expected values are checked for MD5, SHA-1 and CRC32 to avoid displaying a result if the environment does not calculate correctly.
The text you enter stays local: no content is sent to the server to produce the fingerprints.
Limits and reuse
AppErgo tools are provided free of charge for practical and informational purposes. Although care is taken in their design, a result may be incomplete, unexpected or incorrect. Before relying on a result for any important use, check it using an appropriate method.
To report a bug in the tool, you can use the dedicated bug report form.
Results produced by AppErgo tools may be copied and reused freely. When publicly reusing a result, a method or an AppErgo page, a link to the relevant page is appreciated.
Unless otherwise stated, AppErgo texts, images, visual elements, scripts, templates and internal components remain the property of AppErgo.
For any other request, you can contact the webmaster.