Combine PDFs into one file, in the order you actually want
Add as many PDFs as you need, drag them into position, preview the first page of each so you never merge the wrong file, and export a single document. Everything runs inside this browser tab — your files are never sent anywhere.
Built around the parts people get wrong
Most merge tools accept files and produce a blob. The problems show up afterwards: wrong order, a file that silently failed, a 400 MB output that will not send. These are the details this one handles.
Where merging actually saves time
Accountants generally want one file per month, not fourteen separate invoices. Merging them in date order takes about twenty seconds and saves an email thread arguing about missing documents.
Use Sort A–Z if your files are named with a leading date like 2026-03-04-invoice.pdf — alphabetical order and chronological order are then the same thing.
Plenty of application portals accept exactly one attachment. Merging CV, cover letter, portfolio and references into a single PDF is usually the only way to submit everything.
Put the CV first — many recruiters only look at page one. The thumbnail preview makes it obvious which document currently holds that position.
Contracts frequently come back as separate signed pages from different signatories. Merging them into a single executed copy keeps the file usable as one record.
Because this tool runs locally, the contract never touches a third-party server — which matters when the document carries an NDA or client-confidential terms.
Theses and grant applications often need the main document plus appendices as one upload. Merging keeps page numbering continuous across the whole submission.
The generated bookmark outline gives reviewers a jump list of your source documents, which is a small courtesy that makes a long PDF far easier to navigate.
Four things worth checking first
Common questions about merging PDFs
How many PDFs can I merge at once?
There is no fixed limit written into the tool. The practical ceiling is your browser's memory, since every file is held in the tab while merging. Dozens of typical documents are fine on a normal desktop.
Very large scanned files are the real constraint, not the file count. If you are combining several hundred megabytes of scans, merge in two batches and then combine the two results.
Does merging reduce quality or make text unsearchable?
No. Pages are copied across at the object level — the same text, fonts, images and vector paths are carried into the new document without being re-rendered. Nothing is recompressed.
Searchable text stays searchable, and internal links generally keep working. The one thing that does not carry over reliably is interactive form field data, which some readers store in ways that do not survive a merge.
Why is my merged file larger than the sum of the originals?
Usually fonts. If each source PDF embeds its own subset of the same typeface, the merged file can end up carrying several near-identical font subsets that a single document would have shared.
The fix is to run the merged file through a compressor afterwards, which consolidates duplicated resources. In most cases the difference is a few percent, not a doubling.
Can I merge a password-protected PDF?
Not directly. Encrypted files cannot be opened without the password, and this tool deliberately does not ask for one. Any file it cannot read is flagged in the list with an error rather than being quietly skipped.
Remove the protection in your usual PDF application first, save an unlocked copy, and merge that.
Are my documents uploaded anywhere?
No. The merge happens in JavaScript inside this tab. There is no upload endpoint involved — open your browser's Network panel while merging and you will see no request carrying your file data.
That is what makes the tool usable for contracts, medical records and anything else covered by a confidentiality obligation.
Can I reorder pages inside a file, not just reorder files?
This tool works at the file level — each PDF is inserted whole, in the position you place it. Page-level rearranging is a different job.
If you need to drop or reorder individual pages, split the file first, then merge the pieces here in whatever order you need.