About this tool
What is the Image Format Converter?
The ReelStack Image Format Converter switches images between JPG, PNG, WebP, and AVIF formats — entirely in your browser. WebP gives 30-50% smaller files than JPG at equivalent quality and is supported in every modern browser. AVIF compresses even harder but takes longer to encode.
Drop one image or a batch, pick the output format and quality, download. Files never leave your device.
FAQ · IMAGE FORMAT CONVERTER
Questions about the Image Format Converter
Which format should I convert to?
WebP for the best size/quality/compatibility tradeoff (works in Chrome, Firefox, Edge, Safari 14+). AVIF if you want the smallest file and your audience is on modern browsers. PNG if you need lossless or transparency. JPG only for legacy compatibility.
Can I batch convert?
Yes — drop multiple files at once or a folder. Each runs through the conversion pipeline in parallel and downloads as a ZIP when done.
Is it really free?
Yes. Free, no signup, no watermark, no file count limit. The whole tool runs in your browser using its built-in image codecs — no server cost on our side.