File Hash Generator

Work out the MD5, SHA-1 and SHA-256 of a file without uploading it.

Free
No signup
Nothing uploaded
No watermark

Drop a file here

or click to choose one. Any type, any size.

Read in this tab. The file is never uploaded — which is the point: you check a download precisely because you do not yet trust it.

How to Generate a File Hash and Verify a Download

Software sites often publish a checksum next to the download link: a long string of letters and digits. If the file on your computer produces the same string, you have exactly the file they released, with nothing corrupted or tampered with. This tool works out that string for any file.

Drop the file and MD5, SHA-1 and SHA-256 are calculated, with a progress bar for large files. Paste the published checksum into the compare box and the page tells you whether it matches. The file is read locally, which is the whole point: you check a download because you do not trust it yet.

No software to install Free Works on any device

Steps to Check a File Checksum

1

1. Choose the file

Drop any file on the box or click to pick it. Installers, ISO images, videos and documents all work.
2

2. Wait for the hashes

A bar shows how much of the file has been read. MD5, SHA-1 and SHA-256 appear when it finishes, each with a Copy button.
3

3. Paste the published checksum

Copy the checksum from the download page into Compare against a published checksum. A green note confirms a match; a red one warns you not to run the file.
4

4. Add other algorithms

Tick SHA-512 or CRC32 under Algorithms to compute if the publisher uses those. The hashes are worked out again automatically.

Try it now

What Is a File Hash?

A hash is a short fingerprint calculated from every byte of a file. Change a single byte and the fingerprint changes completely. SHA-256 is today’s standard for checking downloads. MD5 and SHA-1 are older and can be deliberately forged, so they are fine for spotting accidental corruption but not for proving a file is safe. CRC32 is a quick check used inside ZIP files.

See an Example

File

A file containing: abc

Checksums

MD5     900150983cd24fb0d6963f7d28e17f72
SHA-256 ba7816bf8f01cfea414140de5dae2223…

Why Use File and Archive Tools?

A ZIP from a colleague, a download with no extension or a folder full of badly named files can stop work for a while. These tools unpack, identify, hash and rename files inside your browser, so nothing is uploaded to find out what it is.

“Know what a file is before you open it.”

Archives opened without software
Downloads checked with hashes
Duplicate files found
Big files packed smaller

Unknown files identified
Files renamed in bulk
Folders compared quickly
Contents never leave your computer

Popular Uses for ZIP and File Tools

These tools help with the small file puzzles that come up every week.

Opening RAR files See and extract what is inside an archive on a computer with no unzip program.
Checking a download Compare a file’s SHA-256 checksum with the one on the download page.
Mystery files Find the real type of a file that has lost its extension or has the wrong one.
Renaming photos Rename a folder of camera photos with dates or numbers in one go.
Clearing duplicates Find repeated files taking up space in a downloads or photos folder.
Sending many files Pack several documents into one ZIP so they travel as a single attachment.
Comparing folders See which files differ between a backup folder and the working copy.
Reading file details Check a file’s size, dates and hidden metadata before sharing it.

What the Hash Generator Calculates

Five algorithms

MD5, SHA-1 and SHA-256 by default, with SHA-512 and CRC32 a tick away.

Checksum matching

Paste an expected value and the matching algorithm gets a Matches badge; spaces and capital letters are ignored.

Algorithm guess

When there is no match, the tool says what kind of hash your pasted value looks like, judged by its length.

Progress for big files

Large files are read in pieces with a percentage bar, so you know it is still working.

Notes on each hash

A line under every result explains what that algorithm is suitable for.

Why Use ToolXkit for File Hash Generator?

Your files stay with you

Everything runs inside your browser. Nothing you open or type is uploaded to a server.

Archive Tools for Different Users

Office workers

Open ZIP attachments and bundle reports together without extra software.

Developers

Check signatures, MIME types and hashes, and create TAR or GZIP files.

IT support staff

Identify strange files and verify downloads before installing anything on a machine.

Photographers

Rename shoots in bulk and find duplicates before backing up a card.

Students

Unpack course material and zip up project folders for submission.

Security-minded users

Check what a file really is before trusting its name or icon.

Best Times to Unpack or Check a File

File tools are useful when you are:

Opening an archive on a new computer
Verifying a software download
Stuck with a file that won’t open
Tidying a messy downloads folder
Emailing a folder of documents
Checking a backup is complete
Renaming lots of photos
Freeing space on a full drive

Tips for Verifying Downloads

Prefer SHA-256 when the publisher offers a choice. It is the one that still resists deliberate forgery.
Take the checksum from the official site over HTTPS, not from the same mirror you downloaded the file from.
Hashing a multi-gigabyte ISO takes a while in a browser. Keep the tab in front until the bar finishes.
Untick algorithms you do not need to make large files finish sooner.

Frequently Asked Questions

Answers to common questions about this tool.

How do I check the SHA-256 of a file?

Drop the file on this page. SHA-256 is calculated along with MD5 and SHA-1. Paste the expected value into the compare box and a green message confirms when the two match.

Is the file uploaded to calculate the hash?

No. Your browser reads the file in pieces and computes the hash on your device. That is important, since the reason for checking a download is that you have not yet decided to trust it.

What does it mean if the checksum does not match?

The file differs from the one the publisher released. It may be an incomplete download, a different version, or a file that has been altered. Download it again from the official source and do not run the mismatched copy.

Is MD5 still safe to use?

MD5 is fine for catching accidental damage, such as a broken download. It is not safe against deliberate tampering, because matching MD5 values can be forged. Use SHA-256 for security checks.

Can I hash a very large file?

Yes. Files are read in chunks, so the practical ceiling depends on your device’s memory and your patience. The percentage bar keeps you informed while it works.

Can I open a RAR or 7z file without installing anything?

Yes. RAR Viewer and 7z Viewer show what is inside and let you save the files you need, all from the browser. This helps on office computers where you cannot install an unzip program.

What is a checksum and why check one?

A checksum is a short code worked out from a file’s contents. If your copy gives the same code as the one the publisher lists, the file arrived complete and unchanged.

Is there a size limit in File Hash Generator?

It depends on your device rather than on the site. Everything is processed in memory in the browser, so a computer handles bigger archives and folders than a phone does.

Is File Hash Generator free to use at work?

Yes. It is free for personal and work use with no account. Because files stay on the machine, it also fits workplaces that do not allow uploading documents to outside sites.

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