Post formats only
Choose portrait 4:5, square 1:1, or landscape 1.91:1 without story, reel, or profile presets getting in the way.
Free Instagram post resizer online
Resize Image for Instagram Post
Free Online Image Resizer for Instagram Post. Resize and fit your photos for Instagram posts directly in your browser.
Upload Instagram post images
Drag Instagram post images here, or click to browse
Instagram post image resizer
Fit Instagram post sizes without cropping
A focused Instagram post size converter for high-quality feed images, no-crop borders, fast local processing, and free browser export.
No-crop fit mode
Fit the full picture inside an Instagram post frame, then add a white border, custom color, or soft blur background.
High-quality export
Export clean PNG files at Instagram post dimensions, including the popular 1080 x 1350 portrait size.
Fast online resizing
Web workers prepare previews in the browser, so batches stay responsive while images resize.
Private by design
Source photos and resized post outputs stay on your device. Image pixels are not uploaded.
Batch downloads
Resize multiple Instagram post images and download ready outputs one by one or together as a zip.
Instagram post size converter
Convert a photo to 4:5, square, or landscape post sizes.
Image Resizer for Instagram Post is built for feed posts only. Use the portrait 4:5 preset for a tall mobile post, square 1:1 for classic grid work, or landscape 1.91:1 when you need to keep a wide picture. Fit full picture is the no-crop option; Crop to format fills the whole frame.
Use the portrait preset when you need to convert an image to a 4:5 Instagram size or export a 1080 x 1350 post. Use the square preset as an Instagram square post resizer, and use landscape for wide photos that should stay horizontal.
Fit full picture works like a gentler online Instagram crop tool: it keeps the whole photo visible, then adds a white border, custom color, or blur background. Batch upload also lets you bulk resize Instagram images, with ready posts downloadable together as a zip.
Instagram post dimensions
Post formats included
FormatSizeRatio
Portrait postBest all-around feed post for more mobile screen space
1080 x 1350 px4:5Square postClassic Instagram grid and balanced product images
1080 x 1080 px1:1Landscape postWide photos, banners, panoramas, and horizontal shots
1080 x 566 px1.91:1How to use
How to fit a full picture on Instagram post without cropping?
Put the full image inside the selected post frame, add border space when needed, then download the Instagram-ready PNG.
1Source
Upload your photo
Select one image or a batch. The tool starts building Instagram post previews locally.
2Format
Choose a post format
Pick 4:5 portrait, 1:1 square, or 1.91:1 landscape. Use Fit full picture when you want no crop.
3Export
Preview and export
Check the Instagram-style post preview, then download a PNG or export all ready posts as a zip.
Instagram tools
More Instagram image resizers
Open the all-in-one Instagram resizer or jump to a single format when you only need one output size.
All sizes
Instagram Image Resizer
Resize posts, Stories, Reels, profile photos, and feed formats from one page.
9:16Instagram Story Resizer
Fit a full photo into a 1080 x 1920 Story canvas without cropping.
9:16Instagram Reels Resizer
Prepare 9:16 Reels images, covers, and thumbnails with safe-zone previews.
1:1Instagram Profile Picture Resizer
Resize a photo for the square profile frame and circular Instagram avatar crop.
4:5Portrait Post Resizer
Convert an image to 4:5 or 1080 x 1350 for a tall Instagram feed post.
1:1Square Post Resizer
Resize a photo to 1:1 for the classic Instagram square format.
1.91:1Landscape Post Resizer
Fit wide photos into the 1.91:1 Instagram landscape post frame.
FAQ
Instagram post resizing questions
Quick answers about 4:5, 1:1, no-crop resizing, white borders, quality, privacy, and batch downloads.
What is the best image size for an Instagram post in 2026?
For feed posts, 1080 x 1350 pixels with a 4:5 aspect ratio is usually the best all-around choice because it uses more mobile screen space. Square 1080 x 1080 and landscape 1080 x 566 are also common Instagram post sizes.
How do I resize image for Instagram post without cropping?
Choose a post format, keep Resize set to Fit full picture, then use a color or blur background to fill the extra space. This keeps the full photo visible inside the Instagram post frame.
Can I convert image to 4:5 Instagram size?
Yes. Select Portrait post in the Format menu and the page will export a 1080 x 1350 PNG with the 4:5 Instagram post ratio.
Can I add a white border for an Instagram post?
Yes. Use Fit full picture, set Background to Color, then choose white before downloading. This works for portrait, square, and landscape posts.
Will resizing make my Instagram post blurry?
The tool exports from the original file you upload at the selected Instagram dimensions. For the sharpest result, start with a large source image and avoid re-uploading an already compressed copy.
Are my photos uploaded to a server?
No. Instagram post resizing runs locally in your browser with browser image APIs and web workers. Your image pixels stay on your device.
Can I resize multiple Instagram post images at once?
Yes. Upload several photos, choose the post format, then download ready outputs one by one or export all completed images as a zip.
Which Instagram post formats are included on this page?
This page includes only Instagram post formats: portrait 4:5, square 1:1, and landscape 1.91:1.