Hash Generator
Generate SHA-1, SHA-256, and SHA-512 hashes from any text using the Web Crypto API.
How to use this tool
- 1Enter or paste text into the 'Input text' textarea.
- 2Click 'Generate Hashes' — SHA-1, SHA-256, and SHA-512 hashes appear below.
- 3Click Copy next to any hash to copy it to your clipboard.
About Hash Generator
This hash generator computes SHA-1, SHA-256, and SHA-512 digests from any text using the Web Crypto API, entirely in your browser.
Checksum comparisons, content-addressing demos, and “did this file change” checks should not require uploading the payload to a hashing site.
Enter or paste text into the 'Input text' textarea. Click 'Generate Hashes' — SHA-1, SHA-256, and SHA-512 hashes appear below. Click Copy next to any hash to copy it to your clipboard. Processing stays in your browser.
Use it to compare digests across systems, to document an expected SHA-256 in a ticket, or to teach why SHA-1 is legacy. Never use raw SHA as a password hash — use a proper KDF.
Hashing is not encryption and not password storage. Do not paste production secrets on shared screens. Algorithms differ in length and collision resistance.
Clear the fields when you are done, especially on a shared machine.
Code examples
JavaScript (Web Crypto)
async function sha256(text) {
const buf = await crypto.subtle.digest(
"SHA-256",
new TextEncoder().encode(text)
);
return [...new Uint8Array(buf)]
.map(b => b.toString(16).padStart(2, "0"))
.join("");
}Python
import hashlib
digest = hashlib.sha256("hello".encode()).hexdigest()Frequently asked questions
Different tools use different definitions and parsers, so small gaps are common. Hash Generator applies crypto.subtle.digest for SHA-1, SHA-256, and SHA-512 with one consistent browser-side rule set. Hidden characters, stricter syntax, or a different tokenizer usually explain the mismatch. Reduce the input to a minimal sample, then add pieces back until the difference appears. Match the rule your destination actually enforces.
Treat the error as a signal that this environment is stricter or configured differently. Browser APIs reject malformed structures early instead of guessing. Convert to a boring intermediate when it helps—plain UTF-8 text, PNG, WAV, or an unlocked PDF—then retry. If the intermediate works, the original encoding was the problem. Keep that minimal sample for the next regression check.
Runtimes disagree even when feature names match. Locales, parser strictness, codec builds, and library versions differ between your browser and CI. Export the exact bytes from Hash Generator, hash them, and compare in the pipeline. Align normalization steps so both systems see the same input. Use the browser result as a reference artifact, then make CI match it.
Desktop apps win on deep feature sets, batch farms, and specialized hardware paths. Hash Generator wins on zero install, private local processing, and speed for the everyday job on this page. Choose desktop software for multi-hour editorial work or exotic edge formats. Choose this tool when you need a correct result quickly without uploading. Many people do a quick pass here first, then open the heavy suite only if an edge case demands it.
Prefer Hash Generator whenever the input is personal, unpublished, customer-owned, or under NDA, because the core transform stays in your browser via crypto.subtle.digest for SHA-1, SHA-256, and SHA-512. Cloud services can still help for formats your browser truly cannot decode, but you must trust their retention policy. Strip secrets before any upload. Privacy is usually the reason to stay local—not a longer marketing checklist.
Start from the best original input you still have. Change only what the destination requires. Prefer lossless intermediates when you must convert twice. Because the tool is local, iterate in small steps: tweak one setting, re-run, compare. Spot-check a short sample before batching anything important.
No account is required for normal use. The core hash generator transform runs in your browser on your device using crypto.subtle.digest for SHA-1, SHA-256, and SHA-512. You get on-screen output, a copy action, or a download without a mandatory ToolBrigade upload for that step. Keep your browser updated. A few lookup utilities may call public reference APIs for live fields only—they still do not need your private documents.
Lighter text, code, calculator, and many image jobs work on modern phones. Large video encodes and huge PDFs are happier on a plugged-in laptop with more RAM. Fully client-side flows can continue offline once scripts are cached; live lookups still need network. If a run seems stuck, try a smaller sample, free memory by closing tabs, and confirm the input is not truncated. Prove the path on a short fixture before blaming the algorithm.