AvePDF vs PDF24 Compare PDF

AvePDF is a browser-based service for editing, converting, and managing PDF and other electronic documents. Its tools cover merging, splitting, compression, conversion, protection, redaction, signing, OCR, PDF/A conversion and validation, and scanning. The converter handles more than 100 formats, including raster and vector images, office and text formats, CAD, and SVG. Files can be uploaded from Google Drive, Dropbox, or a web address, with results saved to cloud storage. The Free plan costs nothing and includes 50+ document tools, 2 processing operations per 6 hours, files up to 128 MB, and up to 10 files per processing. Premium costs $45 a year, billed annually as one payment per user; it includes unlimited processing, files up to 512 MB, and up to 100 files per processing, as well as no ads, technical support, and early beta access. Free-service uploads may be retained to improve services, including to train models; Premium files are not retained. Premium subscribers also receive multiple levels of encryption.

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.