Runs locally · Zero uploads
PDF Merge
Combine multiple PDFs into one. The files stay on your device.
How it works
Combine two or more PDFs into a single document without uploading anything. Page order matches the order you select files. Works on contracts, scanned documents, e-book chapters, exported reports — anywhere you need a single PDF instead of many.
Verify it yourself. Open DevTools → Network → run a conversion. The only requests you'll see are the page assets — your file never leaves this tab.
FAQ
Is there a limit on how many PDFs I can merge?
Practically, around 50 files or 100 MB total before browser memory becomes a concern. The API at api.bytario.com handles larger batches server-side.
What about page order?
Pages are appended in the order you drop or select the files. To reorder, drop them in the order you want them in the output.
Will my form fields stay editable?
Yes — form fields from each source PDF carry through to the merged output. If you want to lock them, run the result through our Flatten tool.