Instagram Image Resizer
Drop an image, pick an Instagram format (square, portrait, landscape, story or profile), and resize it to the exact pixel dimensions Instagram expects. Choose a quality level or set a target file size and the tool auto-tunes quality to hit it while keeping the best possible result. Everything runs locally in your browser.
Read the guide: How to resize an image for InstagramInput
Result
Processed locally in your browser — nothing is uploaded.
How the Instagram Image Resizer works
- Your image is loaded into an in-browser canvas — nothing is uploaded.
- Choose an Instagram format to set the exact target dimensions and aspect ratio.
- Crop to fill or fit inside, with an optional background colour for padding.
- Set a quality level, or enable a target file size to auto-tune quality to fit.
- The canvas is re-encoded as JPEG and the before/after size is shown.
Useful tips
- For posts, 1080px on the long edge is Instagram's sweet spot — larger files are downscaled by Instagram anyway.
- Use Crop to fill for photos where the subject is centred; use Fit inside to keep the whole image with a coloured border.
- Set a target file size (e.g. 300 KB) to auto-optimise quality for fast uploads without manual guessing.
Frequently asked questions
Is my image uploaded?+
No. The image is loaded and resized entirely in your browser. Nothing is uploaded or stored.
What sizes are supported?+
Square 1080×1080, Portrait 1080×1350 (4:5), Landscape 1080×566 (1.91:1), Story/Reel 1080×1920 (9:16) and Profile 320×320.
What's the difference between crop and fit?+
Crop fills the frame by trimming the edges; fit keeps the whole image inside the frame with a coloured background padding.
How does the target file size work?+
The tool binary-searches the JPEG quality to stay under your target while keeping the highest quality that fits.
Related guides
How to compress JPG images
Large JPG files slow down websites and fill up storage. This guide explains how JPG compression works, how the quality setting trades size for sharpness, and how to pick a sensible level for photos and graphics — all using a free tool that runs entirely in your browser.
How to compress PNG images
PNG files are large because the format is lossless and keeps every colour and pixel. This guide explains how PNG compression works, how reducing colour depth shrinks the file while preserving transparency, and how to choose a sensible level — all using a free tool that runs entirely in your browser.
How to compress WebP images
WebP produces smaller files than JPG and PNG while supporting transparency, but it can still be trimmed further by re-encoding at a lower quality. This guide explains how WebP compression works, how the quality setting trades size for sharpness, and how to pick a sensible level — all using a free tool that runs entirely in your browser.
How to reduce image file size to a target
Sometimes you need an image under a specific size — for an upload limit, an email attachment or a web budget. This guide explains how target-size optimisation balances quality and dimensions to hit a file-size limit, and how to reduce an image to 100 KB, 500 KB, 1 MB or 2 MB — all using a free tool that runs entirely in your browser.
Related tools
Compress JPG
Compress JPG images and reduce file size — choose your quality level, all in your browser.
Compress PNG
Compress PNG images and reduce file size while preserving transparency — all in your browser.
Image Brightness & Contrast
Adjust image brightness and contrast with an output quality setting — all in your browser.
Image / PDF / Document Information
Inspect any image, PDF or document and get a full technical summary — format, dimensions, aspect ratio, colour mode, file size and metadata.
