Drop a folder, or click to choose images
JPEG · PNG · WebP · AVIF · HEIC · SVG · GIF · JXL · TIFF
Files never uploaded · 100% client-side · I cannot see your photos · Privacy policy
Output pre-selected: QOI — drop any supported image
This Studio link pre-selects QOI so you can convert to QOI immediately. Convert to QOI for tooling — a simple lossless still for engines and pipelines, not for `<img>` tags or CMS uploads.
Bring JPEG, PNG, WebP, AVIF, HEIC, GIF, SVG, and more — input format is never blocked when you convert to QOI. Encoding uses QOI for fast lossless tooling.
Looking for a specific source format? Use deep links like PNG to QOI or HEIC to QOI for conversion-focused copy, or stay here when your batch is mixed and you still want to convert to QOI.
A ceramic mug product PNG converting to QOI for a local engine.
Similar size, QOI decode path
Before · PNG480 KB — Product texture
After · QOI510 KB — Lossless QOI
Step 1
This page already set output to QOI. You can convert to QOI from JPEG, PNG, WebP, AVIF, HEIC, GIF, TIFF, BMP, SVG, and more in one queue.
Step 2
Add files or a folder. When you convert to QOI, decode and encode stay in the browser — nothing is uploaded.
Step 3
Scrub quality, optionally set a size budget (JPEG, WebP, AVIF, JXL, PNG palette search), then download one file or a ZIP after you convert to QOI.
| Topic | What you get | Note |
|---|---|---|
| Web | No | Do not convert to QOI for sites |
| Lossless pixels | Yes | From decoded bitmap |
| vs PNG | Similar size often | Different decode story |
| Size budget | Skipped | When you convert to QOI |
| Alpha | Yes | Supported |
Convert to QOI from PNG when a game engine or internal tool wants Quite OK Image. Convert to QOI from JPEG stores decoded JPEG pixels losslessly (the QOI will usually be larger than the JPEG).
Convert to QOI is not TinyPNG. It is not a web performance trick. Size budget skips QOI.
Keep PNG/JPEG for humans. Convert to QOI for software that implements the codec.
| Source | Before | After | Note |
|---|---|---|---|
| PNG UI | 80 KB PNG | ~90 KB QOI | Container swap |
| JPEG photo | 2 MB JPEG | ~9 MB QOI | Larger — expected |
| Need web | Any | Convert to WebP | Not QOI |
Drop mixed inputs. QOI encodes quickly in a worker.
No JPEG-style quality slider — lossless from the working bitmap.
GIF first frame / TIFF first page / HEIC bounce still apply before you convert to QOI.
QOI-aware tools and texture pipelines.
When convert to PNG encode time is the bottleneck in your own software (QOI is simpler to decode).
Skip convert to QOI for websites, email, and app stores.
There is no quality trade-off. If the source was lossy, QOI stores those artifacts losslessly.
Resize to the texture size the engine wants before you convert to QOI.
Do not enable PNG Reduce palette expecting it to affect QOI output.
Keep a PNG sibling for preview in normal apps.
When you convert to QOI, Image processing is 100% client-side in your browser with WebAssembly. Your photos are not uploaded, I cannot see or recover them, and sampled session replay is UI-only and does not include image pixels (media is blocked). The site still sends usage analytics and crash reports — details are on the privacy page.
Convert to QOI never uploads the bitmap. GIF still uses the first frame only. TIFF uses the first page only. HEIC decodes to pixels via libheif before you convert to QOI.
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