Review & data · quick answer
What Compare PDF files does
Compare PDF files is a browser-based Filozy tool built for this task: What changed between two drafts, in words not pixels. It runs on this device, creates a separate result, and does not require an account or document upload.
Use Compare PDF files to choose two PDF drafts, identify textual changes between them. The comparison works on document text rather than pixel differences, making wording changes easier to review. Filozy starts the document engine only after you choose a file, performs the work inside this tab, and creates a new result for you to save. Your selected document, its filename, and its contents are not sent to Filozy.
How to compare pdf files in your browser
- Choose two PDF draftsSelect two PDF drafts from the dropzone. Filozy reads it locally and shows the relevant preview or controls before changing anything.
- Review the settingsUse the page preview and available options to decide exactly how compare pdf files should handle this document.
- Create and check the resultRun the tool, review the reported page count, size, or notes, then save the newly created file while keeping the original.
Before you start
- Determine whether the document has a text layer or is an image-only scan.
- Keep the original available while checking extracted text, differences, fields, or metadata.
- Treat uncertain recognition and layout results as items to verify rather than final facts.
Limits worth knowing
- The result depends on the structure and quality of the source document, so visually inspect the exported file before relying on it.
- Browser memory varies by device. Very large or unusually complex PDFs may work better when processed in smaller groups.
Frequently asked questions
What is Compare PDF files used for?
Compare PDF files is a browser-based Filozy tool built for this task: What changed between two drafts, in words not pixels. It runs on this device, creates a separate result, and does not require an account or document upload.
Can I use Compare PDF files on a phone or tablet?
Yes. Compare PDF files works in a current mobile browser. Complex PDFs can need more memory, so keep the tab open, avoid switching apps during processing, and inspect the result before closing the page.
Does Compare PDF files upload my file?
No. The selected file is opened and processed by code running in this browser tab. Document bytes and filenames are not sent to Filozy.
Will this change my original file?
No. Browsers cannot silently overwrite the file you selected. Filozy creates a separate result for you to save or pass to another local tool.
What should I check after using Compare PDF files?
Check the visible preview and the result summary. The comparison works on document text rather than pixel differences, making wording changes easier to review. Keep the original until the new output has been opened and verified.
Do I need an account or subscription?
No account is required for this browser-side tool. It runs on the device and does not use a document-upload allowance or daily server quota.