Merge PDFs online — free

How it works

1. Select 2 to 20 PDF files. The selection order determines the page order in the final PDF.
2. Click Merge. Assembly is instant — no page re-encoding, source content is preserved bit by bit.
3. Download the merged PDF. Source files and result are deleted after 1 hour.

Lossless merge

The merge operates at the native PDF object level, with no compression pass or re-encoding: pages, fonts, images and bookmarks from each source PDF are preserved identically in the final document. No quality loss, no forced page size or orientation change.

To reorder files, select them in the desired order. To insert a PDF in the middle of another, merge the parts into several intermediate PDFs first, then assemble them in the final order.

Limits and formats

Accepted formats: PDF only (all versions, PDF/A, PDFs with layers, read-protected PDFs without password). File count: 2 minimum, 20 maximum per merge. Size: 10 MB per file on free, 200 MB on Premium. To merge more PDFs, run several intermediate merges then a final merge.

Privacy and security

Full processing in France (OVH Gravelines), no US tier. Source PDFs and merged PDF are deleted within 1 hour maximum, no result caching, no indexing. No human intervention has access to the files — only the merge engine. GDPR compliant, DPA available on request.

Frequently asked questions

How many PDFs can I merge at once?

Up to 20 files in a single operation, on free as on Premium. To merge more, chain several intermediate merges.

Can I reorder pages after selection?

The order is fixed by the file selection order. For a different order, re-select the files in the desired sequence. A future version will provide drag-and-drop reordering before merge.

Are password-protected PDFs accepted?

Read-password-protected PDFs cannot be merged as-is — the password must be removed first (via Adobe Reader or equivalent) before submission.

Is the resulting PDF larger than the sum of sources?

No. The merge preserves the combined size of the sources, within a few kilobytes (metadata). To reduce the result size, chain with the Compress PDF tool.