Combine PDFs automatically
Doing this at scale? Automate it with Lido
Select your PDFs and combine them into one file. Lido merges hundreds of files in the order you set, not one at a time in a browser tab.
- Batch merging. Drop a folder of PDFs and Lido combines them in filename order, custom order, or by matching rules.
- Merge by rules. Combine all invoices for the same vendor, all pages for the same patient, or all documents that share a case number.
- Part of your workflow. Combined files feed directly into extraction, naming, and delivery. No re-uploading.
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How it works
Upload
Drop your PDFs or connect a watched folder. Lido picks up new files as they arrive.
Set merge rules
Combine by filename order, by metadata, or by content on the page. Group files that belong together automatically.
Output
Merged files get named, organized, and sent where they need to go. Into a shared drive, into email, or into your next workflow step.
Why teams switch from free PDF mergers
The manual loop
Free browser tools let you merge a handful of PDFs at a time. You upload, drag to reorder, download, rename, and do it again. When your team handles hundreds of documents a week, someone is spending hours on a task that should run on its own.
The Lido approach
Set your merge rules once. When new files arrive, Lido groups and combines them automatically. Output goes to the right folder with the right name. The same rules run again next time without any manual steps.
Lido vs free PDF combiners
| Feature | Lido | Free tools |
|---|---|---|
| Merge hundreds of files at once | ✓ | ✗ |
| Merge by content or metadata | ✓ | ✗ |
| Auto-name and route output | ✓ | ✗ |
| Watched folder (runs on new files) | ✓ | ✗ |
| Merge a few files manually | ✓ | ✓ |
| Browser-based, no install | ✓ | ✓ |
Merging 10 files is easy. Merging 500 is a workflow.
Try Lido free and combine your first batch in minutes.
Common use cases
Reassemble split invoice packets
After splitting and extracting individual invoices, recombine them with their approval sheets into submission-ready packets.
Compile case filing bundles
Merge exhibits, briefs, and cover pages into a single PDF in the order the court requires.
Combine patient records
Merge intake forms, lab results, and physician notes into a single patient file for referral.
Consolidate daily reports
Combine shift reports, inspection logs, or delivery receipts into one daily summary PDF.
See it work on your files in 5 minutes.
Upload a batch, set your rules, and watch them merge.
Enterprise grade security and compliance
Frequently asked questions
How does Lido combine PDFs?
You set rules for how files should be grouped and ordered. When you upload PDFs or they arrive from a connected folder, Lido merges them and outputs the combined file with the name and destination you configured.
Can I merge hundreds of PDFs at once?
Yes. Lido processes files in batch. Drop a folder and every file gets grouped and merged according to your rules. There is no per-file limit.
Can I control the page order?
Yes. Lido merges in filename order by default. You can also set custom ordering by date, document type, or any field extracted from the content.
Is this different from SmallPDF or Adobe Merge?
Those tools work well for merging a few PDFs by hand. Lido is built for teams that merge files in bulk and need the output named and routed automatically.
What happens after files are merged?
Merged files can go to a shared drive, feed into Lido extraction, get emailed, or route to an external system. You configure the destination once.
Do I need to install anything?
No. Lido runs in the browser. You can also connect a watched folder so files get merged automatically as they arrive.
Stop merging PDFs by hand
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