Windows File/Directory/Archive Difference Viewer
formerly WDiff32
Diffoniq shows what changed — between two text files, two folders or two archives, side by side. And it lets you act on the answer: merge marked areas from one side to the other, copy them out, synchronize whole folders, or hand the result over as a report.
| Text comparison | Side-by-side panes with in-place editing: merge marked areas between the sides, paste and delete lines with multi-level undo, and save with an automatic backup. Full Unicode — UTF-8/UTF-16 files and international filenames throughout. |
| Folder comparison | Compares whole trees fast — even very large ones — and verifies equal-sized pairs by content in the background, backed by a persistent hash cache that makes repeat runs almost free. Renamed and moved files are recognized as pairs instead of appearing as added + deleted. |
| Archives | ZIP, 7-Zip, RAR, tar (also compressed), CAB and ISO open like folders — nested archives to any depth, renamed archives are recognized by their content. Compare an archive against a folder or against another archive. |
| Converters | Compare PDF, Word, SQLite, image metadata and other foreign formats as text through user-configured external converters — converted views are marked, read-only, and cached. |
| Synchronization | Turn a folder comparison into action: mirror or update, previewed first, Recycle-Bin deletions, both directions — interactively or headless for the Task Scheduler. |
| Reports | Export the comparison as a self-contained HTML page, plain text or JSON — evidence you can mail, archive or feed to a script. |
| Scripting & AI | Everything above also runs without a window: /report
and /sync answer through exit codes and output files that
appear only complete — built for batch files, CI jobs and AI
assistants. |
| Works with your tools | Drop-in diff viewer for git difftool,
TortoiseGit/TortoiseSVN, Total Commander, WinSCP and the common IDEs
— opens straight into the comparison, read-only where the host
expects it. |
New in this release? What’s New has the full list.
Looking for something specific? The search box above the contents tree searches every help page — results show the matching sentence.