Exact source locations
See 1-based line and column locations for ordinary text, plus format-aware locators for extracted documents.
Browser-local file intelligence
Compare Text and Files Locally
Compare text, search entire folders, inspect archives and find every matching occurrence directly in your browser. Your files stay on your device.
Local processingFiles are processed in this browser session.
Original Text
Modified Text
Folders and archives
Add multiple folders, inspect ZIP/package entries and search supported nested archive content in one workspace.
Local comparison and analysis
Diff files, compare folder paths, hash exact duplicates and calculate named lexical similarity metrics.
Local file tools
Compare filesSide-by-side additions, removals and modified lines.Search inside filesLiteral, whole-word and regex search across selected files.Compare foldersAlign relative paths and verify equality with SHA-256 hashes.Search ZIP filesRead ZIP entries locally with archive safety limits.JSON diffRaw text changes plus structural key/value paths.Analyze filesExact duplicates, Jaccard similarity and shared lines.
A diff checker that does not require a file upload service
Some online comparison tools send text to a server. LocalTextCompare uses a static application architecture: the public pages are static HTML, while selected workspace files are read and processed by browser code.
See how browser-local file processing works or review the security architecture and network-verification steps.