Overview

Diffchecker is a comparison tool for text, code, data, and several other file types, with browser-based and desktop workflows. It suits developers, editors, and operations teams that need to inspect or reconcile changes across varied content. Its breadth is useful, but the free plan’s monthly try limits make it a better fit for occasional than sustained comparison work.

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

Key features

Text, code, and data

Side-by-side and unified views, adjustable diff precision, custom ignore rules, and syntax highlighting give users control over how changes appear. Real-time editing and merging make Diffchecker useful for reconciling revisions, not just spotting them. Basic limits unified view and real-time editing to five tries per month, and character-level differences and merging to ten tries per month; those caps are restrictive for recurring work.

Other file types and integrations

Diffchecker also offers comparison workflows for documents, images, spreadsheets, and folders, including OCR, redlines, formula detection, and batch comparison. This range makes it a more flexible choice than a text-only comparer, particularly for teams handling mixed file types. Git and a Microsoft Word add-in are available with Desktop; Diffchecker Legal and Enterprise add iManage integration. Desktop connects to an iManage Cloud account through Preferences under Integrations.

Privacy and performance

Browser comparisons run in the browser and are not published or shared unless saved and shared. Browser traffic is encrypted with TLS, and the company says its information security program is certified to ISO/IEC 27001. Desktop comparisons run locally without interacting with Diffchecker web servers, which makes Desktop the stronger fit for offline work. There is no file-size limit, but very large files take longer to render in a browser; Desktop is faster because it runs locally.

Pricing

Diffchecker is freemium, with a 14-day Desktop trial that requires no credit card.

Basic: 0.00 USD per free. It offers limited access to Pro features, with some features restricted by monthly try counts. This suits occasional comparisons, but not users who regularly need the capped views, editing, or merge tools.
Pro + Desktop: 15.00 USD per month, billed per user/month. It includes full access to Pro features, a Windows, Mac, and Linux desktop app, and offline comparisons. This is the practical upgrade for frequent users or anyone who needs local work.
Diffchecker Legal: 20.00 USD per month, billed per user/month. It adds iManage integration and profiles for managing comparison settings to Pro + Desktop, making it the relevant tier for legal workflows built around iManage.
Enterprise: 40.00 USD per month, billed per user/month with annual billing only. It includes Pro + Desktop, SAML SSO, iManage integration, SCIM provisioning, and dedicated support. Priority support is included, with dedicated support channels and a service-level agreement.

Pro, Desktop, Legal, and Enterprise include priority support. The free tier’s try counts are the main trade-off; the paid tiers remove the need to ration those Pro features, while Legal and Enterprise charge for specific integration, administration, and support needs.

Platforms

Diffchecker is available on the web and for Linux, macOS, and Windows. Browser comparisons avoid installing a desktop app, while the desktop version provides offline comparisons and faster rendering for very large files.

Who it's for

Developers and engineers can use syntax-aware text comparisons, Git integration, and merge tools. Writers and editors benefit from change inspection across text and document workflows, while data and operations teams may value spreadsheet and folder comparison, formula detection, and batch processing. It is less compelling for users who only need occasional text comparisons and would regularly hit Basic’s monthly caps, or who do not need its broader file support or desktop workflow.

Pros and cons

Pro: Text comparison combines adjustable views and precision with ignore rules, syntax highlighting, editing, and merging, covering both review and reconciliation.
Pro: Document, image, spreadsheet, and folder workflows extend the tool beyond code and prose, including OCR, redlines, formula detection, and batch comparison.
Pro: Desktop supports offline comparisons and runs locally, with faster handling of very large files than the browser.
Con: Basic’s five- and ten-try monthly caps can interrupt regular use of several key features.
Con: Enterprise is billed annually only, so it is a less flexible choice for organizations seeking a monthly commitment.

Alternatives

Compare Suite is a freemium Windows option. Its Light plan covers basic file comparison but excludes folder sync, archives, and Office formats, so Diffchecker’s broader stated file workflows are the better fit when those matter.

Diffract is a freemium alternative for Linux, macOS, and Windows.

delta is a free, MIT-licensed option for Linux, macOS, and Windows, installed through a package manager or executable download.

Diffinity is free for personal and commercial use on Windows 7, 8, 10, and 11, and requires .NET 8.0.

Difftastic is free, MIT-licensed open-source software for Linux, macOS, and Windows.

KDiff3 is a free option from KDE, an international community that builds and distributes free, open-source software.

Meld is free software under GPLv2 or later for Linux and Windows.

Verdict

Diffchecker is a strong choice for developers, editors, and operations teams who want one tool for text changes and wider document, image, spreadsheet, or folder comparisons. Its most persuasive advantages are flexible text review, local offline desktop use, and a clear path from free access to integrations and enterprise controls. Look elsewhere if your work is occasional enough for a free tool without monthly try caps, or if you do not need the broader workflows that justify a paid plan.

	Diffchecker	Kaleidoscope
Free plan	Yes	No
Free trial	Yes	Yes
Paid from	$15/mo	$0.67/mo
Open source	No	No
Platforms	Linux, macOS, Web, Windows	macOS
Free plan	Yes	No
Paid from	15 /user/mo	8 /user/mo
Folder comparison	Yes	Yes
Three-way merge	—	Yes

Diffchecker vs Kaleidoscope

Diffchecker

Kaleidoscope