Hash Generator — MD5, SHA-1, SHA-256 & SHA-512 In Your Browser
Hash text or any file — nothing uploaded, all four algorithms at once
Need to verify a file download, generate a checksum, or hash a string for debugging? This tool computes MD5, SHA-1, SHA-256, and SHA-512 hashes simultaneously — from text you type or any file you drag onto the page. Every calculation runs locally using the browser's built-in Web Crypto API (with a pure-JavaScript MD5 implementation since the Crypto API does not include MD5). No file is uploaded, no data leaves your machine. That makes this tool safe to use with confidential documents, license keys, database exports, or any sensitive file you would not want passing through a third-party server.
How to Generate a Hash from Text or a File
Paste text or drop any file and all four hashes appear instantly.
Hash text
Type or paste any text into the input field. MD5, SHA-1, SHA-256, and SHA-512 hashes update live with each keystroke. This is useful for hashing API keys, tokens, passwords (for debugging only), or arbitrary strings.
Hash a file
Drag and drop any file — a PDF, image, archive, binary, or database dump — onto the drop zone below the text input. The file is read by your browser using the FileReader API and hashed locally. No byte of your file is sent anywhere. The file size is shown so you can confirm the right file was loaded.
Copy the hash you need
Each of the four hash rows has a copy button on the right. Use the UPPER / lower toggle in the header to switch between uppercase and lowercase hex output — some systems (such as certain API authentication schemes) require a specific case.
Features
Generates MD5, SHA-1, SHA-256, and SHA-512 simultaneously
Drag-and-drop file hashing — zero bytes uploaded to any server
Live text hashing updates on every keystroke
Uppercase and lowercase hex output toggle
Copy button on each hash row
Pure in-browser computation using Web Crypto API
Supports any file type: PDF, image, archive, binary
File size displayed to confirm correct file was loaded
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Frequently Asked Questions
Is it safe to hash sensitive files here?
Yes. All computation happens in your browser using the Web Crypto API and a local JavaScript MD5 implementation. No data is transmitted to any server. You can confirm this by opening your browser developer tools and checking the Network tab while hashing a file — you will see zero outgoing requests.
What is the difference between MD5, SHA-1, SHA-256, and SHA-512?
MD5 produces a 128-bit (32 hex character) hash and is considered cryptographically broken for security purposes. SHA-1 produces a 160-bit (40 hex character) hash and is also deprecated for security. SHA-256 (256-bit, 64 hex characters) and SHA-512 (512-bit, 128 hex characters) are part of the SHA-2 family and remain cryptographically secure for most use cases.
Can I use MD5 to verify a downloaded file?
Yes. MD5 is still widely used for file integrity verification — detecting accidental corruption during download. It is not suitable for detecting deliberate tampering (an attacker can engineer MD5 collisions), but for confirming that a download completed without corruption it works fine.
How do I verify a SHA-256 checksum on Linux?
Run sha256sum filename in your terminal. The output is the SHA-256 hash followed by the filename. Compare it character by character against the checksum provided by the file source. You can paste the downloaded file onto this tool and compare the SHA-256 result visually.
Why does my SHA-256 hash differ from the one another tool produced?
The most common cause is character encoding. If your input text contains non-ASCII characters (accents, emoji, Unicode), different tools may encode them as UTF-8, UTF-16, or Latin-1 before hashing, producing different hashes. This tool encodes text as UTF-8, which is the standard for web applications.