Free local encryption tools: generate passwords, check strength, encrypt files in the browser

FastPwd keeps the online password generator, password strength checker, UTM stripper, Burn-Link, and file encryption in the current tab. Plaintext, keys, and files are not uploaded by default. Open a browser and use them—no download, no signup.

Browser encryption AES-256-GCM Plaintext not uploaded
02 / Our principles

We keep encryption in the browser because what needs protecting is never the interface—it is what you are typing right now. FastPwd holds to local compute, plaintext not uploaded: passwords, links, text, and files are processed in the current tab. Results can be checked on the spot. Ready to use—no account first.

[ 03 ] Typical uses

Who uses these tools

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Developers / ops

Use the online password generator to draw a strong random password or a memorable passphrase on this device. Length is 6–128 characters, default 16. Good for databases, servers, and API keys; the result does not leave the browser.

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Ops / support

Before you send a link, strip UTM, fbclid, gclid, and other tracking parameters, then redact phone numbers, emails, and ID numbers locally. Links and source text are not uploaded by default.

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Check password strength yourself

Use the password strength checker to see if an old passphrase is strong enough. The password stays on this device for entropy, and is compared with a public leaked weak-password list—it can catch common weak passwords, but it is not a full-web lookup.

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Send a secret once

Use Burn-Link for a one-time encrypted link to send a password. The server stores ciphertext only; the key sits after # in the link and is not sent with the request. The recipient does not need an account either.

04 / Tool stack

Free online encryption tools

Five tools, each on its own page: online password generator, password strength checker, UTM stripper, Burn-Link, and online file encrypt/decrypt. All compute locally in the browser. Ready to use—no download.

[ 05 ] Technical notes

Encryption runs on the browser's built-in crypto. Plaintext, keys, and files stay on this device by default and are not uploaded as a request body.

Browser crypto API You can check where it runs
[ 06 ] FAQ

Common questions about local encryption tools

FastPwd is a browser-local-first encryption and privacy toolkit: an online password generator, a password strength checker, a link tracker stripper, Burn-Link, and file encryption. Every tool is ready to use—no signup. The site does not offer accounts or a password vault.
They are not uploaded. Password generation, strength checks, link cleaning, text redaction, and file encrypt/decrypt all finish locally in the browser. Burn-Link uploads ciphertext only; the decryption key stays in the hash fragment of the client-side link. See Security for where computation runs.
No. Creating and reading both need no account. The recipient opens the full link and decrypts on this device; after the set count, the ciphertext is deleted, and opening again shows it has been burned.
No. The password you test is not sent to an external API. This page estimates entropy locally and compares it with a built-in public list of leaked weak passwords. It can catch common weak passwords, but it is not a Have I Been Pwned-style full-web lookup.
FastPwd does not hold your passwords. It offers an online password generator, a password strength checker, link cleaning, Burn-Link, and file encryption—all ready to use. Tools like 1Password and Bitwarden store and autofill; this site does not offer accounts or a vault.
No charge, and no app to download. Open a browser to use the online password generator, password strength checker, UTM stripper, Burn-Link, and file encryption. There are no plans, and no support inbox.
[ 07 ] Get started
Start Encrypt

Whether you draw a set of strong random passwords, run a password strength check, or encrypt a file up to 5 GB on this device—open a browser and use it. No download, and no email required first.