How to merge, split, and compress PDFs on iPhone
Lessr is a PDF toolkit for iPhone and iPad that lets you merge, split, and compress PDFs, or create a PDF from your photos. Add your files, pick what you want to do, and Lessr does it right on your device, with no uploads and no account.
How to merge, split, and compress PDFs
- Open Lessr and choose PDF Tools.
- Pick what you want to do: Merge, Split, Compress, or Create from Images.
- Add your PDFs or photos.
- Set any options, like the pages to keep or the page size for a photo PDF.
- Tap to run, then save or share the PDF.
Supported formats
Input: PDFs for Merge, Split, and Compress. Photos (JPEG, PNG, HEIC, WebP) for Create from Images.
Output: PDF.
Split can save one PDF, one file per page, or files grouped by range.
What you can adjust
- Merge several PDFs into one, with optional compression
- Split by page or page range
- Compress a PDF to a smaller size
- Page size (A4, Letter, or fit to image), margins, and page order when creating a PDF from photos
When to use PDF Tools
Combine several PDFs
Use Merge to join multiple PDFs into one file, and turn on compression if you want the combined file to come out smaller.
Fit a PDF to an email limit
Use Compress to make a PDF small enough to attach to an email — it all happens on your device, so nothing is uploaded.
Make a PDF from photos or scans
Use Create from Images to turn a stack of photos into one PDF. Pick a page size, set the margins, and reorder the pages before you create it.
Pull pages out of a PDF
Use Split to take out single pages or page ranges. Save them as one PDF, one file per page, or several files grouped by range.
Tips
- Reorder your photos before creating a PDF so the pages come out in the order you want.
- Turn on compression when merging to keep the combined PDF small.
- Creating a PDF from photos? Pick A4 or Letter for a standard document, or Fit to Image to match each photo's shape.
Frequently asked questions
How do I combine multiple PDFs into one?
Choose PDF Tools, then Merge, and add the PDFs you want to join. Lessr combines them into a single PDF on your device, and you can turn on compression to make the combined file smaller.
How do I make a PDF smaller for email?
Choose PDF Tools, then Compress, and add your PDF. Lessr makes it smaller right on your iPhone or iPad so it can fit an email attachment limit, and nothing is uploaded.
Can I turn photos or scans into a PDF?
Yes. Choose PDF Tools, then Create from Images, and pick your photos. Choose a page size — A4, Letter, or fit to the image — set the margins, reorder the pages if needed, and Lessr makes one PDF from them.
Can I split a PDF into separate pages?
Yes. Choose PDF Tools, then Split, and pick the pages or ranges you want. You can save the result as one PDF, one file per page, or several files grouped by range.
How much smaller will my PDF get?
It depends on the PDF — files with lots of images shrink the most. Lessr saves the smaller copy as a new file and leaves your original untouched, so you can compare.
Is PDF Tools really offline and free?
Yes. Everything happens on your device with no uploads and no account. The free version includes 2 jobs per day, one at a time, and Pro removes the daily limit and adds batch.
PDF Tools runs entirely on your iPhone or iPad — no uploads, no account, no ads.
Download Lessr on the App Store