File Hash Checker — Verify File Integrity with MD5 & SHA Checksums
All 4 algorithms simultaneously · HMAC mode · File hashing · Compare · Batch · 100% browser-side
Type text → get all 4 hashes instantly
MD5 · SHA-1 · SHA-256 · SHA-512 · Real-time
Verify any downloaded file's integrity by comparing its hash against the official checksum. Drag and drop any file — the browser computes MD5, SHA-1, SHA-256, and SHA-512 locally. Nothing is uploaded. Paste the expected hash in Compare Mode to instantly confirm "✅ Match" or "❌ No match".
What is a Hash Function?
A hash function converts any input — text, password, file — into a fixed-length string of hexadecimal characters. The same input always produces the same hash, but even a single character change produces a completely different hash. Hashes are one-way — you cannot reverse them to recover the original input.
MD5 vs SHA-1 vs SHA-256 vs SHA-512
MD5 (128-bit, 32 hex chars) is fast and widely used for non-security checksums but is cryptographically broken. SHA-1 (160-bit, 40 hex chars) is deprecated for security use since 2017. SHA-256 (256-bit, 64 hex chars) is the current industry standard — used in SSL certificates, Bitcoin, and code signing. SHA-512 (512-bit, 128 hex chars) offers maximum security for highly sensitive applications.
Frequently Asked Questions
How do I verify a file hash?
Switch to File mode, drag and drop the file. Copy the hash of your chosen algorithm. Paste the expected hash from the official download page into Compare Mode. You will see ✅ Match or ❌ No match immediately.
Is my file uploaded when I hash it?
No. The file is read locally by your browser using the FileReader API and hashed using the Web Crypto API. Your file never leaves your device — zero uploads, zero privacy risk.
Why should I verify file hashes?
Verifying a file hash confirms the download was not corrupted in transit and was not tampered with by a man-in-the-middle attacker or a compromised mirror server.
Which algorithm should I use for file verification?
Use whichever algorithm the software provider gives you. Most modern software provides SHA-256. If only MD5 is provided (common for older software), use MD5 — it is still reliable for detecting corruption.
What is the maximum file size I can hash?
There is no enforced limit, but very large files (10GB+) may take time depending on your device. The Web Crypto API processes files in chunks, so even large files work without crashing the browser.