Resize Image for Instagram, TikTok, DALL-E, Midjourney (1024, 2048) — Free
Resize images to AI-generator native sizes (1024², 2048², 1024×1792) and social presets (Reels 9:16, IG 1:1, X 16:9). No upload.
Drop image (PNG/JPG/WebP/AVIF)
Up to 50 MB
When to resize an image
- Social feed needs specific dimensions (Reels 1080×1920, IG feed 1080×1080, YouTube thumbnail 1280×720) — preset buttons cover all common platforms.
- AI-generator upscaling — turn a 1024² DALL-E output into 2048² for Midjourney-style prints.
- Stock or print workflow that requires an exact pixel dimension.
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 Resizer 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 resize here
- Built-in presets for the four GPT Image / DALL-E native sizes (1024², 2048², 1024×1792, 1792×1024) — matches what those models actually emit.
- Cover / Contain / Stretch fit modes for controlling how the image maps into the target frame.
- No upload. No size cap beyond browser memory.
Frequently Asked Questions
What size should I use for GPT Image 2, DALL-E 3, or Midjourney?
GPT Image 2 / DALL-E 3 default to 1024×1024 square, 1024×1792 portrait, or 1792×1024 landscape. Midjourney v6+ generates 1024×1024 by default and can upscale to 2048×2048. Presets for all four sizes are built in.
What’s the right size for Instagram / Reels / TikTok / YouTube?
Instagram Feed: 1080×1080 (square) or 1080×1350 (4:5 portrait — larger footprint). Reels / TikTok / Shorts: 1080×1920. YouTube Thumbnail: 1280×720. X / Twitter: 1600×900. Presets cover all of these.
Cover vs Contain vs Stretch — which one?
Cover fills the target and crops the edges (best for platform avatars/banners where you want the frame filled). Contain fits the whole image and adds white bars (best for archival / cross-platform). Stretch ignores aspect ratio (use only when you know what you're doing).
Will resizing up make my image blurry?
Scaling a 1024×1024 AI image to 2048×2048 with canvas bilinear blur is the same quality as Photoshop bicubic. For better upscaling (adding detail, not just pixels), use a dedicated AI upscaler — that's not what this tool does.
Does my image upload anywhere?
No. Canvas resize runs in your browser. Open DevTools Network — zero uploads. Safe for private AI renders, client work, NDA content.