Readyvio guide
JPG, PNG, or WebP: which format should you use?
A format conversion changes how pixels are stored; it does not improve a damaged source. The right choice depends first on what the receiving service accepts.
Prepared by Readyvio from implemented and automated-tested tool behavior. Published ; last reviewed .
JPG for photographs and broad compatibility
JPEG is widely accepted and usually compact for photographs. Its compression is lossy, so repeated saving can soften detail and create artifacts around text or sharp edges. JPEG cannot store transparent pixels.
When converting a transparent PNG to JPG, you must choose the color that replaces transparent areas. Readyvio makes that background choice explicit instead of silently defaulting to black.
PNG for transparency and crisp graphics
PNG preserves transparency and sharp-edged graphics without additional lossy compression. It is often much larger than JPG for photographs. Converting a JPG to PNG preserves the current decoded pixels but cannot restore detail already discarded by JPEG compression.
WebP for supported web workflows
WebP can produce compact web images and can support transparency, but some application portals accept only JPG or PNG. A smaller file is not useful if the destination rejects its format. Browser encoders can also produce slightly different bytes, so inspect the output.
Format decision checklist
Follow the destination’s accepted-format list before optimizing for size.
- Choose JPG for ordinary photographs when JPG is accepted and transparency is unnecessary.
- Choose PNG for transparent artwork, screenshots, or sharp graphics when PNG is accepted.
- Choose WebP for web publishing only when the target explicitly supports it.
- Verify the output format and dimensions, then inspect the downloaded copy.
Always follow the receiving service’s current official requirements. Readyvio verifies technical outputs but does not guarantee acceptance.