Your files stay on your device
File processing runs in your browser. Documents are not uploaded to our servers. The site may download processing engines and send usage or feedback events without file contents.
How we handle your dataLaboratorU
File checks
Browser-only checksum and file-integrity checks for downloads, handoffs, and audits.
File HashCalculate a SHA-256 hash for one file locally in your browser.File SignatureIdentify common file signatures locally from the selected file header.Hex DumpPreview the first bytes of a file as hex and ASCII locally in your browser.Checksum ManifestGenerate a SHA-256 checksum manifest for selected files locally in your browser.Checksum VerifyVerify selected files against a SHA-256 checksum manifest locally in your browser.Duplicate FilesFind duplicate selected files by SHA-256 hash locally in your browser.Large FilesRank selected files by size and flag large-file cleanup candidates locally in your browser.FAT32/exFATCheck selected file sizes and names for common FAT32/exFAT transfer issues locally.Folder ManifestGenerate a path-aware SHA-256 manifest for a selected folder locally in your browser.Folder CompareCompare a source folder and backup folder by relative path and SHA-256 hash locally in your browser.