Convert JPG to PNG, PNG to JPG and WebP to JPG on your phone
A form wants JPG but your screenshot is PNG; a picture saved from the web is WebP and will not open. PDF Maker's Image tools convert pictures between formats on your Android phone, one or many at a time.
These steps are for PDF Maker, our Android app. The app does the work on your phone; this web page does not touch your files.
How to convert a picture to JPG or PNG
- Open PDF Maker and tap Image tools in the Photo group.
- Add the pictures you want to change: JPG, PNG or WebP. You can add many at once.
- Under Convert, choose Change to JPG or PNG and set the Quality.
- Tap the convert button and save the pictures.
JPG or PNG: which to choose
- JPG is smaller and is what most online forms and exam portals ask for. Use it for photos and scans.
- PNG keeps sharp edges and transparency, so it suits screenshots, logos and signatures on a clear background. PNG files are larger.
- WebP pictures saved from websites often will not upload to forms: convert them to JPG.
Pictures that must be under a KB size
For one photo or signature with a size limit (for example 20 KB to 50 KB), use Photo to KB, which also sets the pixel size a form asks for. Shrink to KB in Image tools brings many pictures under one size at once; that batch shrink is part of Pro.
Pictures and PDFs
To put pictures into one PDF, use JPG to PDF. To turn the pages of a PDF into JPG or PNG pictures, use PDF to JPG. Converting formats runs on your phone, and nothing is uploaded.
Questions
How do I convert JPG to PNG on my phone?
Open PDF Maker, tap Image tools, add the JPG, choose Change to PNG and convert.
How do I convert WebP to JPG?
Add the WebP picture in Image tools, choose Change to JPG, set the quality and convert.
Can I convert many pictures at once?
Yes. Add several pictures and they are all converted in one go.
Can I convert a PDF to PNG?
Yes, with PDF to images: every page becomes a JPG or PNG picture.