How to Resize an Image for Instagram, LinkedIn and Job Portals Without Losing Quality

Every platform shows photos inside a frame it designed for its own feed. Instagram's feed is a vertical phone screen, so a tall 4:5 photo fills more of it than a square. LinkedIn's feed is a desktop column and a phone app at the same time, so a wide 1.91:1 image is its default. A job portal shows a small square headshot next to a name, so anything else gets cropped to a square whether you like it or not. The size is not a suggestion — it is the shape of the slot your photo has to fill.

That is why uploading the original file is the worst option, even though it feels like the safest one. A phone photo is typically around 4000 × 3000 pixels — 12 million pixels — and no slot on any of these platforms is anywhere near that big. Instagram caps feed photos at 1080 pixels wide: upload a 2160-pixel-wide image and it scales it down to 1080 itself, with its own compression, on its own terms. Resizing it yourself first means you choose the dimensions, the crop, and the quality — and you can check the result before anyone else sees it.

The arithmetic is kinder than it sounds. A 4000 × 3000 photo resized to 1080 pixels wide becomes 1080 × 810 — 874,800 pixels instead of 12 million, about 93% fewer. That is not lost quality; it is the 93% of pixels no screen was ever going to show. The quality you lose comes from the wrong operations — stretching, upscaling, and repeated re-saving — which this guide will help you avoid.

These are the sizes that cover nearly every upload you will make. They were checked against the platforms' own help pages and current 2026 guides, but platforms do change their specs — if an upload ever behaves differently from what you read here, the platform's upload page is the authority, not this guide.

Instagram

• Feed photo, portrait (best default): 1080 × 1350 px, 4:5. The tallest shape the feed accepts, so it takes up the most screen space as people scroll.
• Feed photo, square: 1080 × 1080 px, 1:1. The safe choice when one file has to work everywhere.
• Feed photo, landscape: 1080 × 566 px, 1.91:1. Supported, but it looks small in a vertical feed — use it only when the photo itself is wide.
• Stories and Reels: 1080 × 1920 px, 9:16. Full-screen vertical, the same canvas for both.
• Profile photo: upload a square at 1080 × 1080 px; it displays as a circle roughly 320 px across, so keep faces centred and corners empty.

One Instagram quirk worth knowing: when you post from the app, a 3:4 photo (1080 × 1440 px) is now kept uncropped, and your profile grid shows a 3:4 preview of every post. A 4:5 post therefore loses a little at the edges on the grid, and a square loses more. None of that changes the sizes above — 1080 × 1350 is still the safest scheduled-post size — but it explains why a photo that looks perfect in the feed can look slightly trimmed on your profile.

LinkedIn

• Profile photo: 400 × 400 px, 1:1, under 8 MB. LinkedIn accepts larger squares and crops them, but 400 × 400 is the size it asks for, and it displays as a circle.
• Profile banner: 1584 × 396 px, 4:1, under 8 MB. Keep text and logos inside the centre — roughly the middle 1200 × 300 px — because phones trim the edges and your circular profile photo sits over the lower-left corner.
• Feed post, landscape: 1200 × 627 px, 1.91:1. The default for link previews and wide photos.
• Feed post, square: 1080 × 1080 px, 1:1. Feed post, portrait: 1080 × 1350 px, 4:5 — the portrait shape takes up the most space on a phone, just as on Instagram.

Job portals and application forms

Job portals are the least standardised of the three, and that is exactly why they cause the most trouble. Most do not publish a size at all — they just show a square upload box and crop whatever you give them. When no size is stated, export a square headshot at 600 × 600 px as a JPG. That is 2 × 2 inches at 300 dpi, the standard print size for a passport-style photo, and it is large enough to stay sharp on screen without being a multi-megabyte upload. If the portal does state a size or a file limit, follow it — and if it accepts your LinkedIn photo, use the same 400 × 400 px square, because the recruiter will very likely see that photo first anyway.

This is the distinction that decides whether a resized photo looks right. Resizing changes the scale of an image: the same photo, smaller. Cropping changes its shape: some of the photo is cut away so what remains fits a different rectangle. Every platform slot has both a size and a shape, and you have to get the shape right before the size means anything.

Take a phone photo at 4000 × 3000 px — a 4:3 rectangle. Resizing it to 1080 px wide with the aspect-ratio lock on gives 1080 × 810, still 4:3, still the whole photo. That works for a blog post or an email, where the slot accepts whatever shape you send. But an Instagram portrait slot is 4:5 — taller than it is wide — and no amount of resizing a 4:3 photo will make it 4:5. Something has to be cut: crop the width from 4000 down to 2400 px, keeping the full 3000 px height, and the remaining 2400 × 3000 is exactly 4:5. Scale that to 1080 × 1350 and it fills the slot perfectly, with nothing the platform needs to cut.

Three worked examples

Instagram Story, from a portrait phone photo: a 4000 × 6000 px portrait is a 2:3 rectangle, and a Story is 9:16 — taller still. Crop the width to 3375 px (6000 × 9 ÷ 16), keep the full height, and the 3375 × 6000 result scales cleanly to 1080 × 1920. If you had resized first and let the app crop, it would have cut the same pixels — but it would have chosen which ones.

LinkedIn banner, from a landscape photo: the banner is 1584 × 396 px, a 4:1 strip. From a 4000 × 3000 px photo, crop the height to 1000 px (4000 ÷ 4), keeping the full width, and the 4000 × 1000 result scales to 1584 × 396. Choose which 1000 px band to keep — the horizon, the faces, the text — because the banner will show only that strip, and the centre of it at that.

A square headshot, from any photo: pick the face, crop a square around it, then resize the square to 400 × 400 for LinkedIn or 600 × 600 for a job portal. Cropping first matters because a square cropped from the full-resolution original keeps far more detail than a square cut out of an already-shrunk copy. Always crop at full size, then resize once.

Our Image Resizer handles the second half of this: exact dimensions, an aspect-ratio lock so nothing stretches, presets from 320 to 1920 px wide, and a side-by-side comparison of the result before you download. It never upscales — if your image is already smaller than the size you asked for, it stays at its original size rather than inventing pixels that were never there. For the cropping half, crop in your phone or computer's photo editor first, then bring the cropped file here to resize. And if the resized file is still heavy, the next step is compression, not more resizing — I covered that separately in How to Compress Images Without Losing Quality.

Mistake 1: Uploading the full-size original and letting the platform decide

The platform will scale your 4000-pixel photo down to 1080 and compress it in the same pass, and it will do it with default settings tuned for speed, not for your photo. Resize it yourself first and you keep control of the dimensions, the crop, and the quality — and you can look at the result before it goes public.

Mistake 2: Stretching a photo to fit a slot

A 4:3 photo forced into a 16:9 banner without cropping does not become a banner photo — it becomes a stretched one, with faces widened and circles turned into ovals. If a slot demands a shape your photo does not have, crop to that shape; never unlock the aspect ratio and drag a side to fit. Our resizer keeps the aspect-ratio lock on by default for exactly this reason.

Mistake 3: Upscaling a small image to a big slot

A 400-pixel headshot cannot become a sharp 1080-pixel portrait, because the extra pixels have to be invented. Upscaling a small image just makes a bigger blurry one. If your only copy is small, use it at a small size — a 400 × 400 LinkedIn photo from a 400-pixel original is honest; a 1080-pixel version of the same file is a blur with ambition.

Mistake 4: Re-saving the same JPEG over and over

Every time a JPEG is opened, edited, and saved again, it is compressed again, and a little detail is lost each round. Resize from the original file every time, not from last week's resized copy. Keep the original, make each export fresh from it, and if you need several sizes, make them all from the same original in one session. PNG and WebP are more forgiving, but the habit still pays — and if you are unsure which format to pick, my guide to PNG vs JPG vs WebP walks through the trade-offs.

Mistake 5: Forgetting the circle and the safe zones

LinkedIn and Instagram both display profile photos as circles, which means the corners of your square are cut off. A face near a corner, or text running into a corner, simply disappears. Centre the face, leave breathing room, and check the circular crop before you upload. The same thinking applies to wide canvases: a Story hides its top 14% and bottom 35% behind buttons and captions, and a LinkedIn banner loses its edges on phones while your profile photo covers the lower-left corner. The safe zone is the middle — put the important part there, and let the edges be decoration.

Here is the whole process, in order, for any photo going to any of these platforms:

1. Start from the original file, not from a copy you already resized or sent. If the photo came to you through a messaging app, ask for the original — I explained why in How to Send Photos Without Losing Quality, and the short version is that messaging apps shrink photos before you ever see them.
2. Decide the shape first. Portrait 4:5 for an Instagram feed post, 9:16 for a Story, 4:1 for a LinkedIn banner, square for a headshot. Crop to that shape at full resolution in your photo editor, choosing what stays and what goes.
3. Resize with our free Image Resizer: type the exact width — 1080 for Instagram, 400 for a LinkedIn photo, 600 for a job portal headshot — keep the aspect-ratio lock on, pick JPG for photos or PNG for graphics with text, and check the side-by-side preview before downloading.
4. If the file is still heavy for its slot, run it through our Image Compressor to shrink the file without changing the dimensions. Resizing sets the size; compression sets the weight. In that order.
5. Before you post, strip the hidden metadata. A resized photo can still carry GPS coordinates and timestamps from the original, so run the finished file through PrivacyClean — it takes seconds, and it is the step most people skip.

That is the whole workflow, and it works for a marketplace listing, a CV photo, or a birthday post exactly as well as it works for Instagram. The platforms change their specs from time to time — bookmark this guide, and if a size ever stops matching what the upload page accepts, trust the upload page. But the principles do not change: shape first, then size, then weight, then privacy.

What size should I resize Instagram photos to?

1080 × 1350 px (4:5) for feed posts — it takes up the most screen space — and 1080 × 1920 px (9:16) for Stories and Reels. A square post is 1080 × 1080 px. Instagram scales anything wider than 1080 px down to 1080 itself, so uploading larger only hands the decision to the platform.

Will resizing make my photo blurry?

Resizing down does not, as long as you resize once from the original and do not upscale. Blurriness comes from upscaling a small image, stretching it to the wrong shape, or re-saving a JPEG many times. A 4000-pixel photo resized to 1080 pixels keeps every bit of sharpness a phone screen can show.

Do I need a different size for LinkedIn and Instagram?

For profile photos, yes: LinkedIn asks for 400 × 400 px, and its banner is 1584 × 396 px, which has no Instagram equivalent. For feed posts the two platforms agree more than you would expect — a 1080 × 1080 square or a 1080 × 1350 portrait works on both. The one size that does not cross over is the landscape post: LinkedIn's is 1200 × 627 px, Instagram's is 1080 × 566 px.

What size photo do job portals want?

Most portals do not publish a size — they show a square upload box and crop what you give them. A 600 × 600 px square JPG is the safe default: 2 × 2 inches at 300 dpi, sharp on screen, small in size. If the portal states a size or a file limit, follow it, and keep a 400 × 400 px version ready for LinkedIn, since recruiters usually look there first.

Should I resize before or after compressing?

Resize first, then compress. Resizing changes the dimensions, compression changes the file weight, and compressing a 4000-pixel photo before resizing it wastes effort on pixels you are about to throw away. Resize to the slot's size, check the dimensions, then compress only if the file is still heavy — in that order, every time.