Merge PDF Files
Merge multiple PDFs into a single file.
Select PDFs
Drag and drop your PDF files here, or select them from your device.
Arrange files
No files in overview.
Merge
Your files stay in your browser and are not stored on our servers.
Support surface
Use this tool inside a clear local boundary
These support notes stay focused on how the browser route behaves, what to expect while you work, and where to go next.
Next task
Continue in another browser-local tool
Move to the next document step without changing how the file is handled.
Typical flow
How to Merge PDF in 3 Steps
- 1 Step 1 Select all PDF files you want to combine using the merge file picker.
- 2 Step 2 Review the file overview and confirm the sequence before running save.
- 3 Step 3 Save the merged PDF and download the single output document.
Quick checks
Answers before you run the job
Is it safe to merge PDFs here?
Use HTTPS to protect files in transit. Processing can run locally in your browser or through service endpoints depending on deployment configuration, so your security posture depends on setup and access controls.
Do my files leave my device?
It depends on configuration. Some deployments process in-browser, while others send files to trusted service infrastructure for processing. Review deployment policy before handling sensitive documents.
Is there a file size or count limit?
Limits are controlled by available memory, browser constraints, and deployment quotas. For large batches, split the merge into smaller groups to reduce failures and speed up completion.
Does this merge tool work on mobile?
Yes, it works in modern mobile browsers. For larger files and big batches, desktop is usually faster and more stable.
Why did my merged file size change?
Output size can change when metadata, object streams, and structure are rewritten during merge. A larger or smaller file does not necessarily indicate quality loss.