File Hash Integrity Checker

A file hash (checksum) is a unique digital fingerprint of a file's content. Even the smallest change—like adding a single space—will result in a completely different hash. This makes hashing essential for verifying file integrity, ensuring that a file hasn't been corrupted during download, tampered with by malware, or modified by unauthorized users.

For modern security and integrity verification, SHA-256 or SHA-512 are the industry standards and highly recommended. MD5 and SHA-1 are much faster but are considered cryptographically broken; they should only be used for simple checksums where security isn't a concern. Our tool supports all major algorithms (MD5, SHA-1, SHA-256, SHA-512, CRC32) to meet various legacy and modern needs.

Our tool is designed to handle Large File Support by processing data in small chunks. This means you can hash multi-gigabyte files (up to several GBs depending on your browser's memory) without crashing the tab. The progress bar will keep you updated during the calculation of heavy files.

The Integrity Snapshot allows you to create a "baseline" of a folder's state. You can save this snapshot as a file. Later, you can load that snapshot and re-verify the folder; the tool will identify if any files were modified, deleted, or if new files were added. This is perfect for monitoring system directories or sensitive project folders.

100% Privacy Guaranteed. Our tool operates entirely client-side. When you "upload" a file, it is read locally by your browser's JavaScript engine. No file data ever leaves your computer. Hashing is performed on your own CPU, ensuring that sensitive documents, private keys, or proprietary software remain completely private.

Hexadecimal (Hex) is the standard way to display hashes (e.g., 5e88489a...). Base64 is a more compact encoding that uses a larger character set, often used in web development and data transmission. Our tool allows you to toggle between these formats and switch between uppercase and lowercase Hex to match your specific requirements.

First, drop your downloaded file into the tool and let it calculate the hash (using the same algorithm the publisher used, usually SHA-256). Then, paste the expected hash from the download page into the "Verify Against Expected Hash" field and click "Verify". The tool will instantly tell you if the hashes match (file is safe) or mismatch (file may be corrupted or tampered).

Yes! Our Batch Processing mode allows you to select or drag-and-drop dozens of files simultaneously. The tool will generate hashes for each file in sequence and display the results in a sortable, searchable table. You can then export the entire list to TXT, CSV, or JSON for documentation or auditing purposes.

Yes! Once the page is fully loaded, you can disconnect from the internet and continue using the File Hash Checker without any interruption. Since all hashing algorithms are implemented in JavaScript (using the Web Crypto API and custom code for MD5/CRC32), no server connection is required for processing.

You can export your results in three formats: Plain Text (.txt) for simple documentation, CSV (.csv) for spreadsheet analysis and bulk auditing, and JSON (.json) for programmatic use or integration with other tools. The Integrity Snapshot also exports as a JSON file for later verification.