File Checksum Calculator
File Checksum Calculator computes a file's SHA-512 checksum locally by reading the complete file into browser memory and compares it to an expected value. Free and private.
File Checksum Calculator is a browser-based web developer tool on WebDevToolsBase. File Checksum Calculator computes a file's SHA-512 checksum locally by reading the complete file into browser memory and compares it to an expected value. Free and private. To use it, choose a file, choose the checksum algorithm, and wait for its checksum — no signup and nothing to install.
File Checksum Calculator is a free checksum Tools utility that runs entirely in your browser — nothing you enter is uploaded.
How to use File Checksum Calculator
- Choose the file whose bytes you want to checksum.
- Choose Algorithm; Expected checksum is an optional comparison value, not the source content.
- Wait for the selected file checksum to finish; changing the file or algorithm starts a new calculation.
- Use Copy to copy the displayed checksum, then compare it with a checksum from a trusted source.
About this tool
File Checksum Calculator computes a checksum from the selected file bytes. The optional Expected checksum field supplies a comparison value; it is not a pasted-text hashing input.
The selected source is processed in your browser. Processing time and supported file sizes depend on the file and your device.
Frequently asked questions
What is File Checksum Calculator for?
File Checksum Calculator computes a checksum from the selected file bytes. The optional Expected checksum field supplies a comparison value; it is not a pasted-text hashing input.
Is File Checksum Calculator free to use?
Yes — File Checksum Calculator is completely free, with no usage limits.
Is my input private in File Checksum Calculator?
Yes — your input never leaves your device; File Checksum Calculator does all the work in your browser.
Does File Checksum Calculator work on mobile?
Yes — File Checksum Calculator is just a web page and runs on any modern browser, including phones and tablets.