Convert image format
image cat converts images between JPG, PNG and WebP locally in your browser, and turns iPhone HEIC into universal formats. Pick a target format, drop your images, convert in one click — files are never uploaded.
Higher = sharper but larger (PNG is lossless, no slider needed)
How to convert image
- 1Drop one or more images (JPG / PNG / WebP / HEIC / AVIF and more).
- 2Pick a target format (JPG / PNG / WebP).
- 3Click “Start”.
- 4Download results individually or as a ZIP.
Why use image cat's Convert Image?
- Local conversion: images never leave your device.
- WebP saves space: converting to WebP is usually smaller than JPG, great for faster sites.
- Batch + ZIP download — a whole set at once.
Frequently asked questions
Input: JPG / PNG / WebP / HEIC / HEIF / AVIF / GIF / BMP and anything the browser can decode. Output: JPG, PNG, WebP (AVIF output coming later).
JPG has no transparency, so transparent areas become white. Convert to PNG or WebP to keep transparency.
Updated · image cat team
Sources, review and limits
Last verified
2026-06-17
Author
Image-Cat editorial team
Reviewer
Image-Cat tooling review
Primary sources
- Browser image decoding, Canvas and download APIs
- Common social, web and device image-size presets
- User-provided images processed locally
Compression and resizing can change quality, metadata and color. Keep originals and verify output before publishing or printing.