Free image resizer
The right size for every platform
Choose a platform and what the image is for, drop it in, drag the crop where you want it and download. All in your browser: your image isn't uploaded.
- Free
- No sign-up
- Runs in your browser
Source: the platform's help page
Drop an image here
Resized in your browser and never uploaded.
How it works
- 1
Pick the platform and what the image is for: a post, a Story, a banner or a thumbnail.
- 2
Drop your image and drag it to choose what stays in the frame, or fit it whole on a background.
- 3
Download it at the exact size, as JPG or PNG.
Image sizes per platform
The sizes the resizer makes, each with where it comes from: the platform's own page wherever it publishes one.
| Platform | For | Size | Shape | Source |
|---|---|---|---|---|
| Portrait post | 1080 × 1350 | 4:5 | the platform's help page | |
| Square post | 1080 × 1080 | 1:1 | the platform's help page | |
| Landscape post | 1080 × 566 | 1.91:1 | the platform's help page | |
| Profile grid (3:4) | 1080 × 1440 | 3:4 | the platform's help page | |
| Story or Reel | 1080 × 1920 | 9:16 | the platform's help page | |
| Profile picture | 320 × 320 | 1:1 | an industry guide | |
| Portrait post | 1440 × 1800 | 4:5 | the platform's ads guide | |
| Square post | 1080 × 1080 | 1:1 | an industry guide | |
| Link preview | 1200 × 630 | 1.91:1 | the platform's help page | |
| Story or Reel | 1080 × 1920 | 9:16 | an industry guide | |
| Page cover | 851 × 315 | 2.7:1 | the platform's help page | |
| Profile picture | 320 × 320 | 1:1 | the platform's help page | |
| Landscape post | 1200 × 627 | 1.91:1 | the platform's help page | |
| Square post | 1200 × 1200 | 1:1 | the platform's ads guide | |
| Portrait post | 1080 × 1350 | 4:5 | an industry guide | |
| Profile banner | 1584 × 396 | 4:1 | the platform's help page | |
| Page cover | 1512 × 256 | 5.91:1 | the platform's help page | |
| Logo or profile picture | 400 × 400 | 1:1 | the platform's help page | |
| X | Landscape post | 1600 × 900 | 16:9 | an industry guide |
| X | Square post | 1080 × 1080 | 1:1 | the platform's ads guide |
| X | Portrait post | 1440 × 1800 | 4:5 | the platform's ads guide |
| X | Header | 1500 × 500 | 3:1 | the platform's help page |
| X | Profile picture | 400 × 400 | 1:1 | the platform's help page |
| YouTube | Thumbnail (HD) | 1280 × 720 | 16:9 | the platform's help page |
| YouTube | Thumbnail (4K) | 3840 × 2160 | 16:9 | the platform's help page |
| YouTube | Shorts thumbnail | 1080 × 1920 | 9:16 | the platform's help page |
| YouTube | Profile banner | 2560 × 1440 | 16:9 | the platform's help page |
| YouTube | Profile picture | 800 × 800 | 1:1 | an industry guide |
| TikTok | Photo post or video cover | 1080 × 1920 | 9:16 | the platform's help page |
| TikTok | Profile picture | 200 × 200 | 1:1 | an industry guide |
Checked 6 November 2026.
Tips
- Tip 1For Instagram's feed, 4:5 portrait (1080 × 1350) takes the most room on a phone.
- Tip 2Keep text and faces away from the edges of covers and banners: phones and computers crop them differently.
- Tip 3Use PNG for text and logos, JPG for photos.
Use it from an AI app
ChatGPT, Claude and other AI apps can run this too, through the free API or the free MCP server. No account or key needed.
API
curl "https://superbridger.com/api/tools/image-sizes?platform=instagram"
JSON in, JSON out, open to any site (CORS). The OpenAPI description lists every endpoint. OpenAPI
MCP server
https://superbridger.com/api/tools/mcp → get_image_sizes
Add https://superbridger.com/api/tools/mcp as a custom connector in Claude, or as an app in ChatGPT. No sign-in.
FAQ
Questions
Is my image uploaded?
No. It's resized in your browser and saved straight to your device.
What happens to the parts that don't fit?
They're cropped. Drag the image to choose which part stays, and zoom in if you like. Or choose Fit to keep the whole image on a background colour.
What size should an Instagram post be?
1080 × 1350 (4:5) takes the most room in the feed. Square is 1080 × 1080, landscape 1080 × 566.
What size is a YouTube thumbnail?
16:9, at least 640 pixels wide. YouTube recommends up to 3840 × 2160; 1280 × 720 stays under the 2 MB limit for uploads from a phone.
Where do the sizes come from?
From each platform's own help pages where they publish one, otherwise its ads guide or a well-known industry guide. Every size lists its source.
More free tools
- Video checkerWill your video post on Reels, TikTok, Shorts, LinkedIn and X? Length, size, shape, codec and sound, per platform.
- Caption checkerOne caption against every platform's limit, counted the way each one counts: X's 280, Instagram's 5 hashtags, YouTube's title.
- Social media specsEvery limit in one dated table: video length and size, caption length, hashtags, photos and Stories. Also as JSON.
- Safe zone checkerSee where the buttons and captions of Reels, TikTok and Shorts cover your video, before you post.
- UTM builderTag a link for every platform at once, so your analytics show which post brought the visitors.
Post everywhere, starting today.
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Superbridger runs these checks before every post, then publishes to every platform at once.