Guides
Short, practical guides to the file problems people run into every day, from iPhone photos that will not open to PDFs that are too big to email. Each one explains what is going on and how to fix it, usually with one of our free converters that run in your browser.
- How to open HEIC photos on WindowsWhy iPhone photos arrive as .heic files, and three ways to open or convert them on a PC.
- How to make a PDF small enough to emailWhy scanned and photo-heavy PDFs get so big, and how to shrink them under email limits.
- What is a WebP file, and how do you open it?Why images saved from websites end up as .webp, and how to turn them into PNG or JPG.
- How to turn PDF pages into imagesSave PDF pages as JPG or PNG, and pick the right resolution for screen, slides or print.
- How to make a favicon for your websiteWhich icon sizes you need, ICO vs PNG vs SVG, and the HTML to add to your site.
- JPG vs PNG: which one should you use?Quality, file size and transparency compared, with simple rules for photos, screenshots and logos.
- What is an AVIF file, and how do you open it?Where .avif files come from, which apps open them, and how to turn them into JPG or PNG.
- What is a JFIF file, and why does Windows keep saving them?Why downloaded pictures end in .jfif, why they are really JPEGs, and how to get .jpg files.
- How to combine photos or scans into one PDFTurn phone photos of documents into one tidy PDF, with tips for sharp pages and small files.
- How to resize photos for email, upload forms and the webWhich pixel sizes to use for email, websites and profile pictures, and how to resize them.
- How to merge, split and reorder PDF pagesCombine PDFs, extract or remove pages, and change the page order without special software.
- How to open TIFF files and convert scans to JPGWhy scanners save .tif files, which apps open them, and how to turn them into JPG or PDF.
- How to reduce a photo to 100 KB or any size limitGet a photo or scan under an upload limit like 100 KB without making it unreadable.