Comprimir PNG / JPG / WebP Online — Compatible con GPT Image, DALL-E, Midjourney
Reduce exportaciones PNG de IA 5-10× convirtiendo a JPEG o WebP. Se ejecuta en el navegador, sin subida.
Drop a PNG/JPG/WebP (or your GPT Image 2 export)
Up to 50 MB
When to compress AI-generated or exported images
- Your GPT Image 2 / DALL-E / Midjourney PNG export is 3-8 MB — way too large to attach in Slack/Gmail/Notion. JPEG at quality 78 shrinks it 5-10×.
- Prepping images for a website or blog where page weight matters — WebP at 80 is ~25% smaller than JPEG at same quality.
- Bulk posting to Instagram / X / TikTok — their re-compression destroys sharpness if the upload is already over-compressed, so you want to send them a clean but already-trimmed file.
Supported formats & limits
| Input formats | PNG, JPG/JPEG, WebP, AVIF, GIF, BMP, HEIC (Safari), TIFF — anything your browser can decode |
|---|---|
| Output formats | PNG (lossless), JPEG (quality 10-100), WebP (quality 10-100), AVIF on Chrome/Edge 122+ and Safari 16.4+ |
| AI-generator native sizes | 1024×1024 (GPT Image / DALL-E square), 1024×1792 (portrait), 1792×1024 (landscape), 2048×2048 (Midjourney upscale) |
| Max file size | Up to 50 MB per image |
| Privacy | Zero uploads — Canvas API runs fully on-device. Open DevTools Network tab to verify. |
| Cost | Free for any use. No signup, no watermark. |
Image Compressor vs. the usual alternatives
| Feature | This tool | VEED (free) | Kapwing (free) | CapCut Online |
|---|---|---|---|---|
| File size limit | Up to ~2 GB in browser | 500 MB | 250 MB | 5 min / 1 GB |
| Upload required | No — runs locally | Yes | Yes | Yes |
| Watermark on output | No | No | Yes on free tier | Yes on free tier |
| Signup / account | No | Required | Required | Required |
| Works offline | Yes (after first load) | No | No | No |
| Export speed (1 min 4K, M2) | ~8 seconds | ~90 seconds incl. upload | ~2 minutes incl. upload | ~60 seconds incl. upload |
Why compress here
- Quality slider with live preview — no blind "medium / high / low" presets.
- Side-by-side before/after file size so you see the savings before downloading.
- Runs entirely in-browser — AI renders under NDA or client work stay on your machine.
Preguntas Frecuentes
Can it compress GPT Image 2, DALL-E, and Midjourney PNG exports?
Yes — AI-generated images ship as huge lossless PNGs (often 3-8 MB for a 1024×1024 square). Converting to JPEG at quality 78 or WebP at 80 typically shrinks them 5-10× with no visible quality loss on photo-style renders. For transparent background PNGs, keep PNG or use WebP (which supports alpha).
What’s the difference between JPEG, WebP, and PNG?
JPEG: smallest for photos; no transparency. WebP: ~25% smaller than JPEG at same quality and supports transparency — modern browsers all support it. PNG: lossless but largest; only pick it when you need perfect fidelity or transparency fallback for old browsers.
Does my image upload anywhere?
No. Compression runs in your browser tab using the Canvas API. Open DevTools → Network tab while compressing — zero uploads. Safe for NDA, unreleased AI art, or anything you don't want on someone else's server.
Is the output as good as a desktop tool like ImageOptim?
For lossy formats (JPEG/WebP), the canvas encoder is the same as the browser's native encoder and produces near-identical quality to Photoshop / ImageOptim at the same target. For lossless PNG, desktop tools with mozjpeg/zopflipng do slightly better — 5-15% smaller — but at 10× the runtime.
Any hard size limit?
Images over 50 MB are rejected (extreme outliers). For a 4K PNG from an AI generator (~5-12 MB), no problem. A 8K or higher export may run out of browser memory on low-RAM machines.