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Resizing an image the right way preserves sharpness, keeps proportions correct, and delivers a clean output at whatever size or file size you need. Whether you are resizing for Instagram, reducing to 100KB for a web form, or preparing images for print, this guide covers everything you need to know.

An AVIF file is an image saved in the AV1 Image File Format — a modern, highly compressed format used across the web. It holds the same kind of photo or graphic a JPG would, but at roughly half the file size. The catch: it's new enough that some older apps and devices can't open it yet, which is usually why you landed here. If you just downloaded an image and it saved as something ending in .avif that won't open, you're in the right place. This guide explains what the file is, why you're suddenly seeing them, and exactly how to open one on Windows, Mac, iPhone, Android, and Linux — plus the one fix that works everywhere.

To merge PDF files free online, upload your documents to Transfonic's PDF Merge tool, arrange them in the order you want, and download the combined file in seconds. No signup, no watermark, no file size limits for standard use.

BMP files are enormous. A single uncompressed bitmap image can be 10, 20, even 50 times larger than the equivalent JPG — with no visible quality advantage for most use cases. Sending a BMP by email, uploading it to a website, or sharing it on social media is slow, impractical, and in many cases simply impossible due to file size limits.