SECURITY TOOLS
Free File Integrity Checker online
Compute SHA-256 hash of any file.
Use File Integrity Checker to compute SHA-256 hash of any file in seconds, straight from your browser. Add your file, adjust the File Integrity Checker options if you need to, then download the result immediately. File Integrity Checker processes everything in your own browser, so your data never leaves your device.
- Free to use
- No signup
- No uploads
- Works offline
Why use File Integrity Checker
- compute SHA-256 hash of any file without installing software
- Your file is processed on your device by File Integrity Checker, never uploaded
- File Integrity Checker needs no account, email address or payment details
- File Integrity Checker is batch-friendly: reuse it immediately on the next file
- File Integrity Checker is keyboard accessible and screen-reader friendly
- File Integrity Checker is free forever, with no watermark on the result
File Integrity Checker runs entirely inside your browser. Your file is never uploaded, stored or shared, and nothing is retained once you close the tab.
How to use File Integrity Checker
- Add your file Drag your file onto the drop zone or pick it from your device.
- Adjust the options Set the options that control how File Integrity Checker handles your input.
- Apply the change File Integrity Checker works instantly on your device, with no queue and no upload wait.
- Download the result Save the finished file straight to your device, then reuse the tool as often as you like.
Benefits
Private by design
Your file stays on your device while File Integrity Checker works. File Integrity Checker never sends it to a server, so confidential work stays confidential.
Instant results
There is no upload step, so File Integrity Checker starts the moment you add your file.
No signup, no limits
Use File Integrity Checker as many times as you want. File Integrity Checker asks for no account, adds no watermark and keeps no paid tier gating the output.
Works offline
Once the page has loaded, File Integrity Checker keeps working without a connection, which helps on flights and locked-down networks.
Who it is for
For legal and finance teams
Legal and finance teams use File Integrity Checker to handle sensitive documents without installing software: compute SHA-256 hash of any file on a shared or locked-down machine.
For HR and admin teams
File Integrity Checker helps HR and admin teams process paperwork quickly, since your file never leaves the laptop it was created on.
For freelancers
File Integrity Checker helps freelancers send client deliverables quickly, since your file never leaves the laptop it was created on.
How it works
File Integrity Checker parses your input in the browser and walks its structure to collect the measurements shown on screen. File Integrity Checker is read-only: the source is held in memory for the session and discarded when you close the tab.
Frequently asked questions
Is File Integrity Checker free to use?
Yes. File Integrity Checker is completely free with no account, no trial and no usage cap. Every feature on this page is available on the first visit.
Does File Integrity Checker upload your file to a server?
No. File Integrity Checker processes your file inside your browser, so it never reaches a DocTools server. That also means the tool keeps working if your connection drops mid-task.
Is there a file size limit?
The practical ceiling is your device's available memory rather than a server quota. Files up to roughly 100 MB work comfortably on a typical laptop in File Integrity Checker.
Do I need to install anything to use File Integrity Checker?
No installation is needed. File Integrity Checker runs in Chrome, Edge, Firefox and Safari, on desktop and on mobile, with no extension or plugin.
Can I use File Integrity Checker on a phone or tablet?
Yes. The File Integrity Checker interface adapts to small screens and supports touch input, though very large jobs are faster on a desktop browser.
What happens to your file when I close the tab?
It is discarded. File Integrity Checker keeps everything in temporary browser memory, so closing the tab removes every trace of the session.
Related tools
- HMAC Generator | Generate HMAC authentication codes
- MD5 Hash Generator | Generate MD5 hash from text
- SHA1 Hash Generator | Generate SHA-1 hash from text
Last updated: 2026-09-07