Image Format Converter
Convert images between JPEG, PNG and WebP — fully offline, no upload.
Convert between JPEG, PNG and WebP in one click
Different formats have different strengths — JPEG for photos, PNG for graphics, WebP for everything on the modern web. This converter turns any input into any of the three output formats, in your browser, without uploading.
Which format when?
- JPEG — best for photos where small size matters and some compression artifacts are acceptable. Universal support, no transparency.
- PNG — lossless, supports transparency. Best for screenshots, UI mockups, logos and icons where every pixel should be preserved.
- WebP — Google’s modern format. 25-35% smaller than JPEG at the same visual quality, with transparency support. Supported by every current browser.
Quality slider (JPEG and WebP only)
The quality setting controls how aggressive the lossy compression is. PNG ignores this setting because it is lossless.
- 90% and above — archival / print. Nearly no visible artifacts.
- 75–85% — the standard for web photos.
- 50–70% — acceptable for thumbnails and low-importance imagery.
Batch conversion
Drop multiple images at once. Each is converted independently and made available for individual download. The browser handles each file in sequence — very large batches (100+ files) may take a few seconds.
Privacy
No image is ever uploaded. The <canvas> element decodes and re-encodes every file locally. When the tab closes, the files are gone.
Frequently asked questions
- When should I convert PNG to JPEG, or JPEG to WebP?
- PNG is lossless — best for screenshots, UI assets and graphics with flat areas of color. JPEG is lossy but efficient for photos. WebP is a newer format that outperforms both in most cases and is supported by every modern browser — usually the best choice for the web.
- Will I lose quality converting between formats?
- Converting from a lossless format (PNG) to a lossy one (JPEG, WebP) introduces compression artifacts. The reverse does not *restore* quality — it just wraps the already-damaged pixels in a larger container. Convert to the destination format you actually need, once, from the highest-quality source you have.
- Why does the PNG output look the same size or larger?
- PNG is lossless, so converting a JPEG to PNG makes the file larger (the JPEG artifacts become part of the pixels). Use PNG only for source material that was originally lossless.