Are my images uploaded anywhere?

No. The file is read directly by your browser and drawn onto a canvas on your own machine. Nothing is sent to Social Magnum or any other server, which is also why the tool keeps working if you go offline after the page loads.

What is the focal point for?

Cropping a wide photo to a 9:16 story throws away most of the width, and every other resizer decides which part to keep by centring. Click or drag anywhere on your image to pin the part that matters — a face, a product, a logo — and every selected size re-crops around it.

What size should an Instagram post be?

1080×1350 (4:5 portrait) takes the most vertical space in the feed and is the best default. Use 1080×1080 for a square and 1080×1920 for stories and reels.

Will resizing make my image blurry?

Scaling down is lossless in practice. Scaling up is not — if your source is smaller than the target size the tool will still produce the file, but it cannot invent detail that was never captured. Start from the largest original you have.

Which format should I choose?

JPG at 90–95% quality for photographs, PNG when you need a transparent background or crisp text and flat colour, WebP when you want the smallest file and only care about modern browsers.

All free tools

Social Media Image Resizer

Drop in one image and get a perfectly-sized copy for every platform — Instagram, Facebook, X, LinkedIn, Pinterest, TikTok and YouTube.

Free, no signup — everything runs in your browser

Drop an image here

or click to choose one — JPG, PNG, WebP, GIF or AVIF

Your file is never uploaded. It is read straight into this page.

Every size, from one upload

The reason a post looks wrong is almost never the photograph — it is the crop. Upload a 16:9 shot to a story and the platform takes the middle third and hopes for the best; upload a portrait to a link card and it shaves the top and bottom off. This tool renders your image once per target size, on your own machine, and lets you decide which part survives the crop.

It covers 26 sizes across 7 networks. Select the ones you need, pick crop or fit, and take them all down as a single ZIP.

The sizes it produces

Instagram

Square post — 1080×1080 (1:1)
Portrait post — 1080×1350 (4:5 — most feed space)
Landscape post — 1080×566 (1.91:1)
Story / Reel — 1080×1920 (9:16)
Profile picture — 320×320 (1:1)

Facebook

Link post — 1200×630 (1.91:1)
Square post — 1080×1080 (1:1)
Story / Reel — 1080×1920 (9:16)
Page cover — 1640×856 (Desktop crop)
Event cover — 1920×1005 (1.91:1)
Profile picture — 320×320 (1:1)

X

Post image — 1600×900 (16:9)
Header — 1500×500 (3:1)
Profile picture — 400×400 (1:1)

Link post — 1200×627 (1.91:1)
Square post — 1080×1080 (1:1)
Page cover — 1584×396 (4:1)
Company logo — 300×300 (1:1)

Standard pin — 1000×1500 (2:3 — the one to use)
Square pin — 1000×1000 (1:1)
Long pin — 1000×2100 (1:2.1)

TikTok

Video cover — 1080×1920 (9:16)
Profile picture — 200×200 (1:1)

YouTube

Thumbnail — 1280×720 (16:9)
Shorts cover — 1080×1920 (9:16)
Channel banner — 2560×1440 (Safe area 1546×423)

Crop or fit?

Crop fills the whole frame and cuts whatever does not fit. It is what you want almost always — a padded post looks like a mistake in a feed. Fit keeps the entire image and pads the edges with a colour you choose, which is worth using for logos, screenshots and anything where losing an edge would lose meaning.

A note on quality

Every network re-compresses what you upload. You cannot stop that, but you can avoid compressing twice: export at 90–95% rather than 100% (the file is far smaller and the difference is invisible), and always resize from your original rather than from something you already exported.

Common questions

Are my images uploaded anywhere?: No. The file is read directly by your browser and drawn onto a canvas on your own machine. Nothing is sent to Social Magnum or any other server, which is also why the tool keeps working if you go offline after the page loads.
What is the focal point for?: Cropping a wide photo to a 9:16 story throws away most of the width, and every other resizer decides which part to keep by centring. Click or drag anywhere on your image to pin the part that matters — a face, a product, a logo — and every selected size re-crops around it.
What size should an Instagram post be?: 1080×1350 (4:5 portrait) takes the most vertical space in the feed and is the best default. Use 1080×1080 for a square and 1080×1920 for stories and reels.
Will resizing make my image blurry?: Scaling down is lossless in practice. Scaling up is not — if your source is smaller than the target size the tool will still produce the file, but it cannot invent detail that was never captured. Start from the largest original you have.
Which format should I choose?: JPG at 90–95% quality for photographs, PNG when you need a transparent background or crisp text and flat colour, WebP when you want the smallest file and only care about modern browsers.

Stop doing this one post at a time

Social Magnum schedules to Facebook, Instagram, Threads, TikTok, YouTube, Bluesky, Mastodon and Pinterest from one composer — with these editors built right in and a calendar that shows you the whole week at once.

Start free See how it works

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