What is LuniPDF? (What)
LuniPDF is a suite of private PDF and image utilities for combining, splitting, arranging, signing, watermarking, converting and stripping photo location information.
When should you use LuniPDF? (When)
Use it to prepare application documents, combine scans, convert compatible photos, or remove hidden photo location metadata before sharing.
Where can you use LuniPDF? (Where)
Go to /lunipdf/ in a browser on a supported desktop or mobile device. Some repeated use may require a paid plan. Open the tool or explore other Lunibyte guides.
How do you use LuniPDF? (How)
Choose the correct PDF or image tool, select your local files, apply the desired action, download the result and reopen it independently to verify each page or image. Follow the controls in order and use a harmless practice file or scenario first.
Why use LuniPDF? (Why)
It supports common document tasks without requiring a third-party upload-and-convert service to hold the original files.
Important limitations
Keep originals. Some operations may change formatting or image fidelity. A drawn signature is not identity verification; confirm free versus Pro use limits.
LuniPDF Guide: Merge, Sign, Compress and Convert Step by Step — Right in Your Browser
This is the hands-on guide to LuniPDF, the PDF and photo toolbox that runs entirely in your browser. Every job below follows the same rhythm: open the tool, drop in your file, download the result. Because the processing happens on your own device, there is no upload step, no waiting room, and no account to create. Your first 3 uses are included across all tools, with no watermark — and LuniPDF Pro unlocks unlimited use whenever you are ready.
If you only remember one thing, remember this address: lunibyte.com/lunipdf. Everything in this guide starts there.
Merge several PDFs into one
Perfect for application packs, reports and contracts with attachments.
- Open LuniPDF and choose Merge PDF
- Drop in all the PDFs you want to combine
- Drag the files into the order you want them to appear
- Download your combined PDF and open it once to check the order
Fill in and sign a PDF on your phone
The Fill & Sign tool does the hunting for you — it finds every signature, initials and date spot in the document.
- Open LuniPDF and choose Fill & Sign PDF
- Drop in the form or contract
- Tap Next to jump to each signature, initials or date spot the tool finds
- Sign or type where it asks, then download the completed document
No printer, no scanner, no uploading a signed contract to a stranger's server.
Compress a PDF so email will accept it
When an attachment bounces for being too large, this is the two-minute fix.
- Open LuniPDF and choose Compress PDF
- Drop in the oversized file — even a 100 MB file starts processing immediately
- Download the compressed PDF
- Attach it to your email and check the new size before you send
Convert a batch of iPhone photos to JPG
HEIC is efficient, but plenty of PCs, printers and websites still cannot open it. Fix a whole folder at once.
- Open LuniPDF and choose HEIC to JPG
- Drop in your iPhone photos — you can add a whole batch
- Download the JPG versions, which open everywhere
Strip the GPS location from a photo before sharing
Photos can carry the exact coordinates of where they were taken. Before you post or send one, take ten seconds to check.
- Open LuniPDF and choose Remove Photo Location
- Drop in the photo to see what location data it is carrying
- Strip the location and download the clean copy
- Share the cleaned copy, not the original
More jobs, same rhythm
The same three beats — open, drop, download — power the rest of the toolbox: Split PDF to extract pages, Organize PDF to reorder, rotate and delete pages, Rotate PDF for sideways scans, Add Page Numbers ("1" or "Page 1 of 10", top or bottom), Watermark PDF to stamp CONFIDENTIAL or DRAFT, JPG to PDF to turn photos and scans into one document, and PDF to JPG to turn pages into shareable images.
Habits that keep you safe
- Check every download. Open the result in a separate viewer before you send it on. A screen preview is good; the actual file is the truth.
- Keep your originals until you have confirmed the output is exactly right.
- Work on your own device. Local processing protects the file in transit and on servers — the device and the downloads folder are yours to look after.
- Know your included uses. Your first 3 uses are included in total across all tools, with no signup and no watermark. Pro removes the limit, priced below every major PDF brand.
Ready when you are
Open LuniPDF and finish the job that brought you here. For the story behind the tool and its new name, read Meet LuniPDF; for the privacy deep-dive, read Why LuniPDF? — both are linked at the top of this page, alongside the rest of our blog and guides.