Compress Images for Twitter/X — Free, Fast & Private
A crisp photo that turns to mush the moment it is posted is X's encoder at work, not your camera. It recompresses every JPEG in the timeline, converts any PNG wider than 900px to JPEG, and downscales whatever exceeds its limits — and the further your file is from what it expects, the harder it hits. Beat it to it: bring the image to 1600 × 900 and 300-500KB yourself, in the format that survives, and the second encode has nothing left to do.
MiniPx runs that step in the browser tab, with no upload to any third-party server. Drop the image in, set the width for the slot you are filling, pick Smart compression, and attach the result.
Twitter/X image dimensions guide
| Image type | Dimensions | Max size | Format |
|---|---|---|---|
| In-feed image | 1600 x 900px | 5MB | JPEG or PNG |
| Header / banner | 1500 x 500px | 5MB | JPEG or PNG |
| Profile photo | 400 x 400px | 2MB | JPEG or PNG |
| Card image (OG) | 1200 x 628px | 5MB | JPEG |
For profile photos, see our passport-size photo resizer to crop a perfect square. For tips across all platforms, check compress images for social media.
JPEG vs PNG on Twitter
Twitter handles JPEG and PNG differently. JPEGs get recompressed (sometimes heavily). PNGs under 900px wide are kept as-is, but larger PNGs get converted to JPEG. If your image has text, sharp edges, or flat colours, try uploading a PNG under 900px — Twitter will preserve it pixel-perfect. For photographs, JPEG at 1600x900 compressed to 300-500KB gives the best results.
Twitter header optimization
The Twitter header banner is 1500x500px (3:1 ratio). It displays differently on mobile — the top and bottom edges get cropped. Keep text and logos in the centre 60% vertically. Compress your header to under 300KB in JPEG for fast loading.
Why tweets with images get more engagement
Tweets with images get 150% more retweets than text-only tweets. But a blurry or poorly cropped image hurts more than it helps. Upload at the exact 16:9 ratio (1600x900), compress to 300-500KB, and your images will look sharp in the timeline. MiniPx makes this a 30-second process.