🔁 Convert Format
Convert between PNG, JPG, WebP — instantly in your browser
✓ Free Forever · ✓ No Signup · ✓ No Upload · ✓ Works Offline
🔒 Your image never leaves your device. All processing happens locally in your browser using Canvas toBlob API. No upload, no server, no tracking.
Features
- Multiple Formats — Convert between PNG, JPG, and WebP — the three most important web image formats.
- Size Comparison — See how the file size changes between formats to pick the most efficient one.
- Instant Conversion — Format conversion happens in milliseconds via the Canvas API.
- Live Format Switch — Switch between output formats and see the result update immediately.
How It Works
- Upload your image — Drop any image in any common format.
- Choose output format — Select PNG, JPG, or WebP from the dropdown.
- Download converted file — Get your image in the new format with a single click.
Use Cases
- Convert PNG to WebP for 30-50% smaller web images
- Convert WebP to JPG for email compatibility
- Convert JPG to PNG for transparency support
- Prepare images in the right format for any platform
Frequently Asked Questions
Which format should I use?
WebP: smallest file, best for web. JPG: widely compatible, good for photos. PNG: lossless with transparency, best for graphics and logos.
Does conversion lose quality?
PNG is lossless — no quality loss. JPG and WebP use slight compression but are optimized for high quality (92% quality setting).
Can I convert AVIF or HEIC?
Input: your browser can read most formats including AVIF and HEIC. Output: currently PNG, JPG, and WebP. More formats are planned.
Notes from Milo 🐨
If the first photo in your batch was damaged (a half-downloaded file, a bad memory card), this page just sat there: no preview, a Download button that never woke up, and no word about why, even with good photos right behind it. Now the broken file is named, the preview moves on to the next photo that opens, and the rest of the batch converts as usual.
Same deal as compress now — no more converting one file at a time. Drop a whole batch, pick PNG/JPG/WebP once, and they all come back together in a ZIP.
From the blog
- 📖 JPG vs PNG vs WebP vs AVIF in 2026 — Which Image Format, and When — A plain-English guide to the four image formats that matter — what each is good at, where each falls apart, and a simple rule for picking one. With a free converter to switch between them.
- 📖 How to Convert PNG to JPG (and Back) — and Which One You Actually Want — Convert PNG to JPG (or the reverse) in your browser with no upload. Steps, the real PNG vs JPG vs WebP difference, and the transparency gotcha to avoid.
Related Tools
- 📦 Compress Image — Reduce file size without losing quality — all in your browser
- ↔️ Resize Image — Change image dimensions — instantly in your browser
- Image to Base64 — Turn an image into a Base64 data URI, or encode and decode Base64 text — and turn Base64 back into a file
💬 Bug, idea, or just to say hi? Tell Milo 🐨 · [email protected]