File Checksum
Verify file integrity by comparing SHA-256 checksums of any file.
About File Checksum
Verify file integrity by comparing SHA-256 checksums of any file.
File Checksum generates the SHA-256 fingerprint of any file you choose and verifies its integrity by comparing that digest with the value published by the download source. The file is read entirely inside your browser, so installers, firmware images and research datasets never leave your device. Alongside the sixty-four character hash you get the exact file size, the algorithm used and a plain match or mismatch result that appears as soon as you paste the expected checksum. Developers use it to confirm release artifacts, students use it to prove an assignment file was not altered, and administrators rely on it before running downloaded packages. File Checksum is free, requires no account and keeps every byte local.
How to Use File Checksum
- Open the tool and allow any permission it asks for (only if needed).
- Follow the on-screen controls to run the task.
- Review the result shown live on the page.
- Copy, save or share the output as required.
Key Features
- No installation or account — just open the page and use it.
- Clear, guided interface that works on desktop and mobile.
- Everything runs locally in your browser for privacy and speed.
Frequently Asked Questions
How does File Checksum confirm a downloaded file is unchanged?
Drop the file into the page and the tool reads it locally, calculates the SHA-256 digest and shows the full sixty-four character value along with the file size. Paste the checksum published by the vendor or the developer and the tool compares both strings character by character, reporting a clear match or mismatch. Because the hashing happens in the browser, large files stay private and the verdict appears within seconds.
Is File Checksum free to use?
Yes. File Checksum is completely free with unlimited use — no account, download or payment required.
Is my data uploaded to a server?
No. File Checksum runs entirely in your browser. Your inputs are never sent to our servers or stored anywhere.
Does File Checksum work on mobile?
Yes. The interface is fully responsive and works in any modern browser on Android, iPhone, tablets and desktops.
Related Utility Tools
Keyboard Tester
Test every key on your keyboard: press keys to light them up, spot ghosting and see key codes live.
Mouse and Scroll Test
Check left, right and middle clicks, double-click speed, scroll direction and pointer precision on one page.
Screen Ruler
Measure anything on your screen with a calibrated on-screen ruler — set the reference width once, then measure freely.
Calendar Generator
Generate a printable monthly or yearly calendar with week start choice and custom event marks.