Social Media Image Resizer
Resize any picture to the exact dimensions Instagram, X, Facebook, LinkedIn, YouTube and Pinterest expect. Runs in your browser — nothing is uploaded.
About Social Media Resizer
Social Media Image Resizer crops or pads a picture to the exact pixel dimensions each platform expects, with a live preview so you can see what will be kept and what will be cut before you download.
Uploading the wrong aspect ratio is not a cosmetic problem. Platforms crop automatically to fit their layout, and the automatic crop is centred and indifferent to your composition — which is how a banner loses the right third of a product, and how a headshot arrives with the top of someone's head cut off. Sizing deliberately beforehand means you decide what survives.
The choice between the two fit modes is the whole tool. Crop to fill scales the picture until it covers the frame and trims whatever falls outside, which is what you want for a cover or banner where filling the space matters more than keeping every edge. Fit inside scales until the entire image is visible and pads the difference with a colour you choose, which is what you want for a logo, a product shot on white, or a diagram where cropping would destroy the meaning.
Dimensions also make a real difference to sharpness. Every platform re-encodes what you upload, and starting from an image already at the target size avoids a second resample on their servers — the step that makes text in a screenshot look soft after posting. The presets here follow each platform's published recommendation, which is why several differ from the square-ish sizes people assume.
How to resize an image for social media
- Drop in your image.
- Pick a preset for the platform and placement you are targeting.
- Choose Crop to fill for banners and covers, or Fit inside to keep the whole picture.
- If fitting inside, pick a padding colour that suits the artwork.
- Check the live preview, then download at the exact size.
Tips & common problems
Fit inside for logos, crop to fill for photos
A cropped logo looks like a mistake; a padded photograph looks like a mistake. Match the mode to the subject rather than using one for everything.
Start larger than the target, never smaller
Scaling down keeps detail; scaling up cannot invent it. If your source is smaller than the preset, the result will look soft no matter what.
Keep the important content centred
Cropping trims symmetrically from the edges. If your subject sits far to one side, recompose before resizing rather than after.
Padding colour should match the destination
White bars look clean on a light feed and obvious on a dark one. Sampling a colour from the image itself usually blends best.
Frequently asked questions
What size should an Instagram post be?
1080 × 1080 for a square, 1080 × 1350 for a portrait, and 1080 × 1920 for a story or reel. Portrait occupies the most vertical space in the feed, which is why many accounts prefer it.
What is the difference between crop to fill and fit inside?
Crop to fill scales until the frame is covered and trims the overflow. Fit inside scales until everything is visible and pads the remainder with your chosen colour.
Is my image uploaded?
No. Resizing happens entirely in your browser using a canvas, and the picture never leaves your device.
Why does my upload still look blurry?
Usually the source was smaller than the target, so it had to be enlarged. Platforms also re-encode uploads; starting at the exact recommended size minimises that second pass.
What size is a YouTube thumbnail?
1280 × 720, a 16:9 frame. That is also the safest size for a general video preview elsewhere.
Does it keep transparency?
PNG input stays PNG and keeps its alpha channel. Other formats are saved as high-quality JPEG, which has no transparency — so pick Fit inside with a background colour if that matters.