Question 1

What is WebP and why should I use it?

Accepted Answer

WebP is a modern image format developed by Google that provides superior lossless and lossy compression. WebP images are typically 25–35% smaller than comparable JPEG or PNG files, making them ideal for web use.

Question 2

What is AVIF?

Accepted Answer

AVIF (AV1 Image File Format) is the newest image format, offering even better compression than WebP — typically 50% smaller than JPEG at the same quality level. It is supported in Chrome, Firefox, and Safari.

Question 3

Can I convert HEIC images (iPhone photos)?

Accepted Answer

Yes. Sharp automatically detects HEIC images from iPhones. Upload a .heic file and convert it to JPEG, PNG, WebP, or any supported format.

Question 4

When should I use PNG vs JPEG?

Accepted Answer

Use PNG for images that require transparency (logos, icons, screenshots with text) or images where lossless quality is essential. Use JPEG for photos and images with complex gradients where some quality loss is acceptable.

Question 5

Is conversion done on my device or on a server?

Accepted Answer

Image conversion uses our server-side conversion powered by the Sharp library (libvips). Your file is processed and immediately discarded — it is never stored.

Question 6

Is there a file size limit for conversion?

Accepted Answer

Yes. Each file must be under 20 MB. This limit exists because format conversion requires server resources.

Question 7

Can I convert multiple images at once?

Accepted Answer

Yes, you can convert up to 20 images in one batch. They are processed three at a time to avoid overloading the server.

Question 8

Will converting to WebP reduce quality?

Accepted Answer

At the default 80% quality setting, the difference is imperceptible to most people. You can increase quality to 95–100% for pixel-perfect output at the cost of a larger file.

Question 9

Can I convert GIF to WebP?

Accepted Answer

Yes. Converting animated GIFs to WebP often results in significantly smaller file sizes while preserving the animation.

Format	Best for	Transparency	Animation	Browser support
WebP	Web images	✓	✓	Chrome, Firefox, Safari, Edge
AVIF	High-efficiency web	✓	✓	Chrome, Firefox, Safari 16+
JPEG	Photos	✗	✗	All browsers
PNG	Logos, icons, screenshots	✓	✗	All browsers
HEIC	iPhone photos	✗	✗	Safari, Chrome (with extension)
GIF	Simple animations	✓	✓	All browsers

Image Format Conversion

Image Format Comparison

Frequently Asked Questions