About Merge PDF Online
Merge PDF Online stitches separate PDFs into one downloadable document. Upload two or more files, optionally reorder them, and process with the same merge pipeline exposed as POST /v1/pdf/merge. Ideal for assembling contracts, reports, and scanned packets before you automate the workflow with an API key.
How to use
- Upload two or more PDF files.
- Arrange the document order with the sorter.
- Start the merge job.
- Download the combined PDF when processing completes.
Features
- Multi-file upload and sort
- Async merge with signed download
- Matches FatBaby PDF Merge API credits
- Works alongside compress and OCR tools
Supported formats
application/pdf
Use cases
- Combine signed pages from different scanners
- Assemble multi-part proposals into one PDF
- Package appendices with a cover letter
Privacy and credits
Temporary outputs expire on a short retention window. Track usage from the dashboard ledger. Pricing is the same for tools and API calls that share an operation.
Related tools
Category: pdf tools · Related API · Documentation
Automate with the API
Ready to ship? Authenticate with Authorization: Bearer fb_live_… against https://www.thefatbaby.com/api. Official SDKs are under Developers → SDKs.
FAQ
How many credits does this use?
About 1 credit per run (same rate as the public API).
How long are files kept?
Processed files are deleted after about 24 hours.
Do I need an account?
Yes for file tools. Sign in with your FatBaby dashboard account — no API key paste required.
Where are uploaded files stored?
Temporary processing files are cleaned up on a short retention window (typically within 24 hours). Do not upload secrets you cannot afford to expose.