Are hashes and checksums calculated on my device?

Yes. Hashing runs in the browser, so you can check a downloaded file's checksum without handing that file to a third party — which rather defeats the point of verifying it.

Which hash algorithms are available?

MD5, SHA-1, SHA-256, SHA-384 and SHA-512. MD5 and SHA-1 are there for matching published checksums and legacy systems; both are broken for security purposes, and the tool says so on the page.

Can Filesvo open a password-protected ZIP?

No, and it says so instead of failing quietly. Encrypted archives are detected and refused with a clear message, rather than producing an empty or corrupt extraction you would only notice later.

Are QR codes and UUIDs generated offline?

Yes. The QR and barcode images are drawn in your browser and the UUIDs come from the browser's own cryptographic random number generator. No third-party generator API is called, so the values are never seen by anyone else.

Developer Tools

Pack and unpack ZIP and TAR archives, generate QR codes and UUIDs, verify hashes and file checksums, and convert text to and from Base64 — fast, free and entirely in your browser. Every tool shows honest results and never uploads your data.

Generators

QR Code Generator

Turn any text or link into a scannable QR code, downloadable as PNG or SVG — entirely in your browser.

UUID Generator

Generate cryptographically random UUIDs — v4 or time-ordered v7, up to 1,000 at once.

Hashes & encoding

TAR to ZIP

Repack a .tar, .tar.gz or .tgz archive into a standard ZIP — entirely in your browser.

ZIP to TAR

Repack a ZIP archive into a .tar.gz or plain .tar — entirely in your browser.

Barcode Generator

Generate Code 128 and EAN-13 barcodes, downloadable as PNG or SVG — entirely in your browser.

Hash Generator

Compute MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text — entirely in your browser.

File Checksum

Compute MD5, SHA-1, SHA-256, SHA-384 and SHA-512 checksums of any file — entirely in your browser.

Base64 Encode

Convert any text to Base64 — Unicode-safe, entirely in your browser.

Base64 Decode

Decode Base64 back to readable text — with clear errors for invalid input, entirely in your browser.

Guides

How to create a tar.gz file

Build one in your browser or with one tar command — plus every tar flag worth remembering.

Convert .tar.gz to ZIP

The ZIP is usually the bigger file — measured, with the reason and the numbers.

All of these run on your browser's built-in engines — no uploads, no accounts, and honest refusals (like password-protected ZIPs) instead of silent failures.

Frequently asked questions

Are hashes and checksums calculated on my device?: Yes. Hashing runs in the browser, so you can check a downloaded file's checksum without handing that file to a third party — which rather defeats the point of verifying it.
Which hash algorithms are available?: MD5, SHA-1, SHA-256, SHA-384 and SHA-512. MD5 and SHA-1 are there for matching published checksums and legacy systems; both are broken for security purposes, and the tool says so on the page.
Can Filesvo open a password-protected ZIP?: No, and it says so instead of failing quietly. Encrypted archives are detected and refused with a clear message, rather than producing an empty or corrupt extraction you would only notice later.
Are QR codes and UUIDs generated offline?: Yes. The QR and barcode images are drawn in your browser and the UUIDs come from the browser's own cryptographic random number generator. No third-party generator API is called, so the values are never seen by anyone else.

Developer Tools

Archives

Generators

Hashes & encoding

Guides

Frequently asked questions