Overview

Diffchecker is a comparison tool for text, code, data, and several other file types, with browser and desktop workflows. It suits people who need to inspect or merge changes across different kinds of content, especially developers, editors, and operations teams. Its broad feature set is appealing, but Basic’s monthly try counts make it better for occasional use than regular, high-volume work.

For related options, see Diff and Merge Tools, File Comparison Software, and Document Comparison Software.

Key features

Text and code comparisons

Side-by-side and unified views, adjustable diff precision, custom ignore rules, and syntax highlighting give users control over how differences appear. Real-time editing and change merging make Diffchecker more useful than a read-only viewer when collaborators need to reconcile revisions. Basic users get only five tries per month for unified view and real-time editing, and ten for character-level differences and merging. Those caps are restrictive for recurring work; Pro removes them through full access to its features.

Other files and large comparisons

Diffchecker also supports comparison workflows for documents, images, spreadsheets, and folders. OCR, redlines, formula detection, and batch comparison extend its reach beyond code and prose. The site states there is no file-size limit, but very large files take longer to render in a browser; Desktop runs locally and is faster for those files.

Privacy, integrations, and support

Browser comparisons run in the browser and are not published or shared unless saved and shared. Desktop comparisons run offline on the computer, and the Desktop product page says the app does not interact with Diffchecker web servers. Browser traffic is encrypted with TLS, and Diffchecker says its information security program is certified to ISO/IEC 27001.

Git and a Microsoft Word add-in are listed for Desktop. Legal and Enterprise include iManage integration; Desktop can connect to an iManage Cloud account through Preferences under Integrations. Pro, Desktop, and Legal include priority support, while Enterprise adds dedicated support and a service-level agreement.

Pricing

Basic is free, but monthly try caps on selected features make it a limited option for anyone comparing files routinely. The 14-day Desktop trial requires no credit card, so users can evaluate offline work before paying.

Basic: 0.00 USD per free. Limited access to Pro features, with some features restricted by monthly try counts. Best for occasional comparisons.
Pro + Desktop: 15.00 USD per month, billed per user/month. Adds full access to Pro features, Windows, Mac, and Linux desktop apps, and offline comparisons. This is the practical choice for regular individual or team use that does not need legal or enterprise controls.
Diffchecker Legal: 20.00 USD per month, billed per user/month. Includes Pro + Desktop, iManage integration, and profiles for managing comparison settings. It fits legal teams that use iManage and need consistent settings.
Enterprise: 40.00 USD per month, billed per user/month, annual billing only. Includes Pro + Desktop, SAML SSO, iManage integration, SCIM provisioning, and dedicated support. The annual-only term and per-user charge suit organizations needing centralized access and support, not casual users.

Platforms

Diffchecker is available on the web and as a desktop app for Windows, macOS, and Linux. The browser option suits quick comparisons; the desktop app is the better fit for offline work and very large files.

Who it's for

Developers and engineers can use syntax-highlighted code diffs, Git integration, and merging. Writers and editors get text comparisons and document redlines, while data and operations teams can draw on spreadsheet, formula, folder, and batch comparison workflows. Users who need only occasional basic comparisons may find the free plan sufficient; frequent users should account for its monthly caps.

Pros and cons

Pro: One tool covers text and code alongside document, image, spreadsheet, and folder comparisons, reducing the need to switch tools for different file types.
Pro: Offline desktop comparisons and local processing are useful for users who need work to stay on their computer.
Pro: Paid plans scale from full Pro access to iManage, identity management, and dedicated support.
Con: Basic’s five- and ten-try monthly limits can interrupt regular use of key comparison and merge features.
Con: Enterprise requires annual billing, which is a less flexible commitment for smaller or short-term needs.

Alternatives

For a free option, SourceGear DiffMerge is available for Linux, macOS, and Windows, with free use. Meld is another free choice for Linux and Windows, distributed under GPLv2 or later. Windows users looking for a free open-source option can consider WinMerge. P4Merge and mergers are also free options for Linux, macOS, and Windows.

Diffract is a freemium alternative with free and trial options for Linux, macOS, and Windows. Code Compare is a freemium alternative for Windows and extension platforms, with free and paid Pro versions. Compare Suite is another freemium option for Windows.

Verdict

Diffchecker is a strong fit for people who need text and code diffs alongside broader file comparisons, particularly when offline desktop work or specialized team integrations matter. The main reason to choose it is that range, backed by adjustable text diffs and merging; the main reason to look elsewhere is Basic’s restrictive quotas or the per-user cost of paid plans for narrower comparison needs.

	Diffchecker	Mergely
Free plan	Yes	Yes
Free trial	Yes	No
Paid from	$15/mo	Free
Open source	No	No
Platforms	Linux, macOS, Web, Windows	api, self-hosted, Web
Free plan	Yes	Yes
Paid from	15 /user/mo	—
Folder comparison	Yes	—
Three-way merge	—	No

Diffchecker vs Mergely

Diffchecker

Mergely