PDF24 Compare PDF vs Xodo Compress PDF

PDF24 Compare PDF compares two versions of a PDF and marks text that has changed, been added, or been removed. Readers can view the documents side by side, as an overlay, or with a slider. The comparison runs directly in a browser without installation, and PDF24 says the files are not uploaded to its servers. Google Drive is listed as a file-selection option. Use is free, with no registration or time restrictions. PDF24 says transfers are SSL secured and server files are automatically deleted after one hour. For offline processing, PDF24 Creator keeps files on the local PC, but it can only be installed on Windows; Linux and Mac are not supported. PDF24 Tools can be installed from a browser on Android or iPhone and iPad, though it is not distributed through Google Play or the App Store. PDF24 says its online tools are available to companies free of charge and without restriction, and a data-processing agreement can be requested.

Xodo Compress PDF reduces PDF file size through an online compressor with Low and High compression settings. The free online plan permits one Low compression action per day; High compression requires a trial. Xodo says uploaded files are protected with TLS encryption and permanently deleted after one hour. The compressor is part of a wider set of Xodo tools available on web, Windows, macOS, Linux, Android and iOS. Xodo Web includes more than 40 online tools, and the Document Suite combines web and desktop tools. Xodo PDF Studio offers more than 60 professional tools and works offline, with Light, Balanced, Aggressive and custom optimization profiles. It can optimize batches of PDFs and handle batch conversion, text extraction and security operations. Xodo Mobile can view, scan, edit, annotate, convert, compress and e-sign documents, with connections to Xodo Drive, Google Drive, OneDrive, Dropbox and iCloud. Pricing includes a free plan, a 3-day trial and paid options from $7.99/mo (annual).