Freedom251 › Document Comparison Software
Diff Doc
What Diff Doc is
Diff Doc is a Windows desktop tool for comparing documents and folders. It handles PDF, Word, Excel, PowerPoint, RTF, HTML, XML, and plain text files, and can show differences side by side or in a combined view at word or letter level. It can identify formatting changes and produce redline output. For folder checks, it first identifies files that differ before a detailed comparison. Comparison reports can be created in Microsoft Word, HTML, text, or comma-delimited formats. The product supports command-line comparisons, batch processing, and scheduled or automated runs. It can launch from Windows Explorer, the desktop, and Find In Files through a right-click menu. Privacy Mode prevents file names and paths from comparisons being loaded or saved across sessions. The maker lists integrations with Worldox and TortoiseCVS, plus command-line integration with other document management software. Diff Doc has no free plan; a free 30-day trial is offered. Pricing is listed from $299.95, and the Diff Doc Professional plan is $499.95, paid once for a perpetual license.
Who it suits
Diff Doc suits Windows users who need document or folder comparisons, including word- or letter-level review, redlines, and reports. Its command-line and batch options may also suit teams that automate comparisons.
What it does well
- Compares PDF, Office, and several other file formats.
- Offers word- or letter-level comparison views.
- Can compare folders before detailed file review.
- Supports command-line and scheduled comparisons.
- Privacy Mode prevents cross-session loading or saving of paths.
What to know first
- No free plan.
- Paid; pricing starts at $299.95.
- Listed for Windows; Mac use requires Parallels or VMware Fusion.
- Free trial lasts 30 days.
Limits
There is no free plan. The trial lasts 30 days; the listed Professional license is a perpetual purchase, with user licenses, maintenance upgrades, and server licensing selectable.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Diff Doc Professional | Perpetual license; not a subscription · Default displayed total price · Number of user licenses, maintenance upgrades, and server license are selectable | $499.95, paid once |
As softinterface.com lists them, read 8 Oct 2026. The maker's own page has the final word.
Getting started
- Open the Diff Doc website
- Start the free 30-day trial
- Install the Windows desktop application
- Launch it from the desktop, Windows Explorer, or Find In Files
- Choose files or folders and select a comparison view
Verdict
Diff Doc combines broad file-format coverage with folder comparison, reports, and automation features in a Windows desktop product. It is paid software, but the maker offers a 30-day trial and money-back guarantee on purchases.
Questions
What files can Diff Doc compare?
It compares PDF, Word, Excel, PowerPoint, RTF, HTML, XML, and plain-text files.
Does Diff Doc compare folders?
Yes. It can identify differing files in folders before performing detailed file comparisons.
Is there a free plan or trial?
There is no free plan, but SoftInterface offers a free 30-day trial.
What platforms does Diff Doc support?
It supports 32-bit and 64-bit Windows operating systems and Windows Server. Mac users can run it through Parallels or VMware Fusion.
How much does Diff Doc cost?
Pricing starts at $299.95. Diff Doc Professional is listed at $499.95, paid once as a perpetual license.
Facts from Diff Doc's own pages
- Automation
- The product supports command-line comparisons, batch processing, and scheduled or automated comparisons. · softinterface.com, 8 Oct 2026
- Company history
- SoftInterface says it was established in 1999 and develops file comparison and conversion software, particularly for Microsoft Office users. · softinterface.com, 8 Oct 2026
- Comparison views
- It displays differences in either Side By Side or All In One views, with word- or letter-level comparisons. · softinterface.com, 8 Oct 2026
- Folder comparisons
- It can compare folders and identify files that differ before a detailed file comparison. · softinterface.com, 8 Oct 2026
- Founded
- 1999 · softinterface.com, 28 Sept 2026
- Headquarters
- The company lists its office address as 938 Lincoln Blvd #6, Santa Monica, California 90403, United States. · softinterface.com, 8 Oct 2026
- Integrations
- The maker documents integrations with Worldox and TortoiseCVS, and describes command-line integration with other document management software. · softinterface.com, 8 Oct 2026
- Platform support
- The FAQ says Diff Doc works on 32-bit and 64-bit Windows operating systems and Windows Server; Mac users can run it through Parallels or VMware Fusion. · softinterface.com, 8 Oct 2026
- Privacy mode
- Privacy Mode prevents Diff Doc from loading or saving file names and paths from comparisons across sessions. · softinterface.com, 8 Oct 2026
- Privacy policy scope
- The privacy policy describes information practices for the SoftInterface website and says it does not collect credit card numbers on the site. · softinterface.com, 8 Oct 2026
- Purpose
- Diff Doc compares PDF, Word, Excel, PowerPoint, RTF, HTML, XML, and plain text files. · softinterface.com, 8 Oct 2026
- Reports
- It can create comparison reports in Microsoft Word, HTML, text, and comma-delimited formats. · softinterface.com, 8 Oct 2026
- Support
- SoftInterface says most email responses arrive within hours and at most 24 hours, with chat listed from 7 AM to 5 PM PST. · softinterface.com, 8 Oct 2026
- Trial and guarantee
- The maker advertises a free 30-day trial and a 30-day money-back guarantee on purchases. · softinterface.com, 8 Oct 2026
- Windows Explorer
- The product can be launched from Windows Explorer, the desktop, and Find In Files using the right-click menu. · softinterface.com, 8 Oct 2026
Where Diff Doc stands on Freedom251
- Document Comparison Software#18 of 25