Bundlephobia
bundlephobia.com
Shows what an npm package costs your bundle before you install it
No sign-up
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gchq.github.io
Chains encoding, hashing and decryption steps into a repeatable recipe.
GCHQ's open-source data-mangling bench: drag operations — base64, gzip, XOR, AES, MD5, SHA-256, regex extract, JSON beautify — into a recipe that runs top to bottom over your input. The whole recipe encodes into the URL, so you can send someone the exact transformation rather than instructions for it. Everything executes in the page, which makes it safe for material you would never upload.
AltFTool does this too
If you would rather not leave the site, SHA-256 Hash Generator covers the same job here — free, no account, and it runs in your browser.
Open SHA-256 Hash GeneratorQuestions
Works the moment the page loads. No account, no email, no trial. The operation list runs to hundreds of entries with no guidance — finding the right one is harder than running it.
No. CyberChef does the work inside your browser, so the file never leaves your device — you can load the page, disconnect from the network, and it still works. That makes it a reasonable choice for material containing personal data.
The operation list runs to hundreds of entries with no guidance — finding the right one is harder than running it.
Alternatives
Same category or same task, ordered by how closely they overlap.
bundlephobia.com
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caniuse.com
Answers whether a browser feature is safe to ship yet
crontab.guru
Translates a cron expression into a plain English schedule as you type
devdocs.io
One fast search box across a hundred API references, usable offline
jwt.io
Decodes a JSON Web Token into readable header, claims and signature
onecompiler.com
Compiles and runs code in around seventy languages with no sign-up