PDF24 Compare PDF

Overview

PDF24 Compare PDF is a browser-based tool for comparing two versions of a PDF, best suited to readers who need to locate text changes without installing a desktop app. Its strongest advantage is a no-cost, no-registration workflow; the main compromise is that the offline desktop route works only on Windows.

Key features

The tool marks text that has changed, been added or removed, and offers side-by-side, overlay and slider views. That choice is useful when a reader needs either to read the versions in parallel or align them visually; the focus is on comparing PDFs rather than a broader review process.

Comparison runs in the browser, and PDF24 says files are processed there rather than uploaded to its servers. Google Drive appears as a file-selection option. PDF24 also says transfers are SSL secured, its servers are in Germany, and files on those servers are automatically deleted after one hour. Companies can use the online tools free of charge and without restriction, and can request a data-processing agreement by email or contact form.

PDF24 Tools also supports Office file comparison, PDF import, fillable form creation and signature fields, with PDF as an export format. Its listed input sources include Word, Excel, images, printable files, a scanner and a camera, making the wider toolkit more useful than the comparison page alone for basic PDF work.

Pricing

The Free plan costs nothing, is funded entirely by advertising, and has no limits, registration requirement or time restrictions. It suits occasional users as well as companies that need ongoing access without subscription charges. There is no paid tier to unlock extra comparison capacity, but users who require offline processing must use the separate Windows-only PDF24 Creator.

The online tools have no time restrictions or forced premium version. PDF24 says they carry no subscription traps, so the free option is not a time-limited trial that turns into a paid plan.

Platforms

The comparison runs on the web. PDF24 Creator adds offline processing with files kept on the local PC, but it installs only on Windows; Linux and Mac are not supported. Creator can also be used with Citrix and is free for companies.

PDF24 Tools can be installed from a browser on Android and iPhone or iPad, but it is not distributed through Google Play or the App Store. That route may suit users willing to install from a browser, but it is less direct than a store-listed app.

Who it's for

Choose PDF24 Compare PDF for quick text-difference checks when you want browser access, multiple comparison layouts and no subscription commitment. It is also a practical fit for organizations that can use the online workflow or deploy PDF24 Creator through Citrix. Look elsewhere if offline processing is essential on Mac or Linux, or if your work depends on a mobile app obtained through a standard app store.

Pros and cons

Pros: Three comparison views and clear marking of changed, added and removed text help readers review document revisions in the way that suits them.

Pros: Free access without registration or time limits makes repeat use viable for individuals and companies alike.

Pros: Browser-side comparison keeps the stated workflow distinct from server uploads.

Cons: The offline Creator option is Windows-only, ruling it out for Mac and Linux users who need local processing.

Cons: The Android and iPhone/iPad installation route is browser-based rather than through Google Play or the App Store.

Alternatives

If your priority is a paid form-routing product with a free trial and support across web, mobile, desktop and self-hosted deployments, consider FormRouter. For a paid PDF editor with a free trial, Foxit PDF Editor has a PDF Editor plan at $129.99 a year, billed annually, including DMS and 300 AI credits per month.

FormForge is another free option with a free plan and broad platform support. PDF Studio is worth considering when a desktop PDF reader for Linux, Mac or Windows is the priority: its free Viewer supports annotation and interactive forms, while Pro costs $149, paid once.

For form creation, Jotform offers a free Starter plan with standard features and usage limits, including 5 forms and 100 monthly submissions. Sejda PDF Forms has a free Desktop+Web plan with page, hourly, upload and tool-specific limits, plus a $5, paid once Web Week Pass.

Adobe Scan is an alternative for Android and iOS. PDFgear offers a free plan across mobile, desktop and web, with a 100 MB per PDF limit for its online editor.

For broader category browsing, see Document Comparison Software, PDF Form Software, PDF Creation Software, PDF Merger Software and PDF Compression Software.

Verdict

PDF24 Compare PDF is an easy recommendation for anyone who needs a free, browser-based way to inspect text changes between PDFs, especially when multiple viewing layouts matter. Its no-limit access and stated local comparison are compelling; choose another tool if your requirement is offline use beyond Windows or a mobile app distributed through an app store.