MEDIA NO.012
Image Format Converter
Convert between JPG, PNG, WebP and AVIF locally — instant download.
This tool runs entirely in your browser. Nothing is uploaded to any server.
What is this
什么是图片格式转换
不同格式各有所长：JPEG 适合照片、PNG 适合透明与截图、WebP/AVIF 是新一代高压缩格式。转换即重新编码——注意 JPG 转 PNG 不会「还原」已丢失的画质。
What is image conversion
Each format has a sweet spot: JPEG for photos, PNG for transparency and screenshots, WebP/AVIF for modern compression. Conversion re-encodes the image — converting JPG to PNG won’t recover quality that was already lost.
如何使用
- 拖入图片。
- 选择目标格式与质量。
- 预览并下载。
FAQ
WebP or AVIF?
WebP balances compatibility and compression — the safe default. AVIF compresses better but encodes slower and has slightly narrower support.
Will converting to PNG make it bigger?
Usually yes — PNG is lossless, so re-encoding a JPG to PNG inflates size with no quality gain. Choose by purpose.
Why is the AVIF option greyed out?
AVIF encoding depends on browser capability. If unsupported, the option is disabled while other formats keep working.