Calculate MD5, SHA-1, SHA-256 or SHA-512 checksums of a file and compare them with a published value.
The file is read and hashed in your browser and is not uploaded. A matching checksum shows the file was not corrupted or altered in transit; it does not prove the publisher is trustworthy. Prefer SHA-256 over MD5 and SHA-1 where a choice exists.
Hop to nearby dev utilities without losing context.
Quick steps so you can get results fast.
Input text, code, or payloads directly. Most tools auto-detect format and encoding.
Choose the transform—format, validate, convert, or decode. Defaults match the current tool.
See live output alongside the input so you can spot issues before copying.
Copy results to clipboard or export when available. No signup needed.
Everything you need to know about Checksum Calculator.
Answers to the most common devtool questions.
Most dev tools run entirely in your browser. For tools that need server help, requests are encrypted.
No. Inputs are kept in-memory in your session. Nothing is logged for formatting or validation tools.
Yes. Common shortcuts like Ctrl/Cmd + A/C/V work. Some tools also support Ctrl/Cmd + Enter to run.
We preserve semantics. Converters and formatters avoid altering values, only structure and spacing.
Use the feedback link in the header or share a sample payload. We typically patch fixes within a day.