HashCalc: MD5, SHA, HMAC by Goyal Softech solves a very specific problem: you have a file or a string and you need to check its hash, right now, without opening a terminal. That job does not need an app install. So we built Digest Lab, a free hash generator that runs right here in your browser. Type or paste your text, or drop in a file, and MD5, SHA-1, SHA-256, and SHA-512 all appear at once.
Generate a hash now
It opens with a working example already hashed. Type your own text to see every value update instantly, or drop a file onto the tool to hash that instead.
How to use it
Type or paste text into the box and all four hashes recompute as you type, no calculate button needed. To hash a file instead, drag it onto the drop zone or click to choose one from your device; the tool reads it locally with the browser’s File API and hashes the raw bytes. Each result has its own Copy button so you can grab exactly the hash you need. Your last text entry is saved on your device so it is there the next time you open the page, and nothing you type or drop is ever sent anywhere. SHA-1, SHA-256, and SHA-512 come from the browser’s built-in Web Crypto API; MD5 is not part of that standard, so Digest Lab includes its own compact, verified implementation that runs entirely in JavaScript.
How it compares to HashCalc
Digest Lab covers the core loop of HashCalc: give it text or a file, read off the hash, copy it. That is the job most people open a hash tool for, and it works offline once the page has loaded, on any device with a browser.
The full HashCalc app goes further. It adds HMAC generation with a secret key, more algorithm variants, batch processing across multiple files, and a persistent history you can browse later, all built for people who check hashes as a regular part of their workflow rather than a one-off.
Our honest take: use Digest Lab when you need to verify a download’s checksum or compare two strings and want an answer in seconds without installing anything. Install HashCalc when you work with hashes often enough that HMAC support and saved history earn their place on your phone.
Get the full app
HashCalc: MD5, SHA, HMAC by Goyal Softech is free on Android and adds HMAC generation, more hash algorithms, and a saved history of past results.
Frequently asked questions
What is a hash and why would I need one?
A hash is a fixed-length fingerprint of a piece of data. The same input always produces the same hash, and changing even one character produces a completely different one. People use hashes to verify a downloaded file was not corrupted or tampered with, to check that two files are identical without comparing them byte by byte, or to store a fingerprint of data instead of the data itself.
Which hash algorithm should I use?
For checking a file checksum against one a website publishes, use whichever algorithm they list, usually SHA-256 today. SHA-1 and MD5 are still common in older software and are fine for spotting accidental corruption, but neither is considered secure against a deliberate attacker anymore. SHA-256 and SHA-512 are the current standard choices for anything security-sensitive.
Does this hash tool work offline, and is my data uploaded anywhere?
Yes to both. Once the page has loaded, hashing keeps working without a connection, because every calculation happens in your browser using either the Web Crypto API or a small local JavaScript function. Your text and files never leave your device.
Is this the official HashCalc app?
No. Digest Lab is an original tool we built, inspired by the quick-check problem HashCalc solves. It is not affiliated with, endorsed by, or connected to Goyal Softech. If you want HMAC generation, more algorithms, and a saved history, get the official app from the store above.
Can I hash a large file in the browser?
Yes, within reason. Digest Lab reads the whole file into memory before hashing, so very large files, several gigabytes or more, may be slow or use noticeable memory on lower-end devices. For everyday checksum verification on typical downloads, it handles the job comfortably.
