Drop any file here
or click to browse — file stays in your browser
Auto-detected algorithm & compared against results
Ready to hash
Select a file and click Compute Hashes// compute md5, sha-256 of any file — no upload needed
Compute MD5, SHA-1, SHA-256, and SHA-512 checksums of any file instantly in your browser. No upload, 100% private, client-side hashing only.
Drop any file here
or click to browse — file stays in your browser
Ready to hash
Select a file and click Compute HashesDrag your file onto the drop zone or click to browse. Any file type works — it never leaves your device.
Pick one or more: MD5, SHA-1, SHA-256, SHA-512. SHA-256 is recommended for security-sensitive verification.
Click Compute Hashes. Optionally paste an expected checksum to instantly verify file integrity.
This tool computes cryptographic hash values of any local file entirely inside your browser using the Web Crypto API. No data is ever sent to a server — your file stays 100% private. Use it to verify file integrity after downloads, or detect tampering.
No. This tool uses the browser's built-in Web Crypto API to compute hashes entirely on your device. Your file never leaves your machine, making it safe to use with sensitive documents, private keys, or proprietary software.
MD5 produces a 128-bit (32-character hex) fingerprint of a file. While it is no longer considered cryptographically secure for passwords or signatures, it remains widely used for non-security file integrity checks such as verifying download completeness.
All three are part of the SHA family. SHA-1 produces a 160-bit hash and is considered weak for security purposes. SHA-256 (part of SHA-2) is the current standard for file verification — used by most software distributors. SHA-512 offers a longer 512-bit hash for extra collision resistance.
There is no hard limit — the file is read in streaming chunks so even multi-gigabyte files can be processed without crashing your browser. Hashing speed depends on your device's CPU. A 1 GB file typically hashes in 3–10 seconds on modern hardware.
Any single-bit difference in a file will produce a completely different hash. Common causes include line-ending differences (LF vs CRLF), metadata changes, partial downloads, or encoding mismatches. Even a single invisible character will change the hash entirely.
Yes. Copy the expected hash from the software publisher's website, paste it into the "Compare Hash" field, and this tool will automatically detect the algorithm (MD5/SHA-1/SHA-256/SHA-512) and show a ✅ match or ❌ mismatch result.
Once the page is loaded, the hashing itself works offline since it relies only on the browser's Web Crypto API. You do not need an internet connection to compute hashes after the initial page load.
For most file verification tasks, SHA-256 is the recommended choice — it is secure, fast, and universally supported. Use MD5 only when the source provides only an MD5 checksum. Avoid SHA-1 for new security-sensitive workflows, as it has known collision vulnerabilities.
A file hash checker is a tool that computes a cryptographic digest — called a hash or checksum — from the binary contents of any file. The hash is a fixed-length hexadecimal string that acts as a unique fingerprint: even a single-byte change in the file will produce a completely different hash output. This property makes hashes invaluable for verifying file integrity, detecting tampering, and confirming that a file transferred without corruption.
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This tool leverages the browser's native Web Crypto API (crypto.subtle.digest()) introduced in modern browsers. When you select a file, JavaScript reads it as an ArrayBuffer in chunks using the FileReader API, then passes the binary data to the cryptographic digest function. The result is returned as an ArrayBuffer of bytes, which is then converted to a lowercase hexadecimal string for display.
Because everything happens inside the browser sandbox, your file's contents are never transmitted over the network. This makes the tool safe for hashing sensitive files such as private keys, configuration files, medical records, or proprietary software binaries.
MD5 was designed by Ronald Rivest in 1991 and produces a 128-bit (32 hex characters) digest. It remains one of the most common checksums you will encounter — many older software distributions and CDN providers still publish MD5 hashes alongside downloads. However, MD5 is not cryptographically secure: collision attacks have been demonstrated, meaning two different files can be crafted to share the same MD5 hash. Use MD5 only for non-security purposes such as detecting accidental corruption, never for verifying the authenticity of untrusted software.
SHA-1 produces a 160-bit (40 hex characters) hash and was the dominant algorithm for code signing and SSL certificates throughout the 2000s. In 2017, Google demonstrated a practical SHA-1 collision attack (SHAttered), effectively retiring SHA-1 for security-sensitive applications. Many legacy tools and protocols — including older Git commits and some enterprise software distributors — still provide SHA-1 checksums for backward compatibility. This tool supports SHA-1 for verification against such legacy checksums.
Part of the SHA-2 family standardised by NIST, SHA-256 produces a 256-bit (64 hex characters) digest. It is currently the recommended standard for file integrity verification. Major software distributors — including Linux distributions, Docker Hub, Homebrew, and most cryptocurrency projects — publish SHA-256 checksums. No practical collision attacks exist against SHA-256, and it is fast enough for real-time use on files of any size.
Also part of SHA-2, SHA-512 produces a 512-bit (128 hex characters) digest. It provides a larger security margin than SHA-256 and on 64-bit hardware can actually be faster than SHA-256 due to optimised 64-bit arithmetic. SHA-512 is used in high-security contexts, including some Linux package managers and certain financial systems. For most everyday file verification tasks, SHA-256 is sufficient.
Verifying software downloads: When you download an ISO image, installer package, or binary from the internet, the publisher typically provides a checksum on their website. After downloading, you can compute the hash of your local file and compare it against the published value. A match confirms the file is identical to what the publisher distributed — protecting you from corrupted downloads or man-in-the-middle substitution attacks.
Detecting file tampering: In security auditing and digital forensics, hashing is used to create an evidence chain. When a file is collected, its hash is recorded. If the file is later found to have a different hash, it indicates the file was modified — either accidentally or maliciously.
Identifying duplicate files: Two files with identical hashes are guaranteed to have identical content (hash collisions are astronomically rare for SHA-256). This makes hashing an efficient way to find duplicate files in large directories without byte-by-byte comparison.
Version control and build systems: Build tools like Bazel, Gradle, and Nix use file hashes as cache keys. If a source file's hash has not changed, the build output can be served from cache. Docker layer hashing follows the same principle.
Database integrity: Storing hashes of critical records allows systems to detect silent data corruption (bit rot) in storage media over time.
Each hash result is displayed as a lowercase hexadecimal string. MD5 is always 32 characters, SHA-1 is 40 characters, SHA-256 is 64 characters, and SHA-512 is 128 characters. When comparing hashes, the comparison is case-insensitive — 3d94e... and 3D94E... are the same hash. This tool normalises both the computed hash and the expected hash to lowercase before comparison, so you don't need to worry about case differences.
If the "Compare Hash" field is used, the tool auto-detects the algorithm based on the length of the pasted hash: 32 chars → MD5, 40 chars → SHA-1, 64 chars → SHA-256, 128 chars → SHA-512. A green ✅ indicates the file matches the expected checksum exactly; a red ❌ indicates a mismatch and the file should not be trusted.
Because this tool runs entirely in your browser, it is safe to use with any file regardless of sensitivity. There are no server-side logs, no analytics on file content, and no data retention of any kind. The Web Crypto API used for hashing is provided by your browser's security-sandboxed cryptographic module — the same module used for HTTPS connections — so the hash computation itself is trustworthy and tamper-proof from a software perspective.