Image Resizer
Drop an image and resize it three ways: enter exact pixel dimensions with optional aspect-ratio lock, pick a percentage (25%, 50%, 75% or custom), or choose a platform preset for Instagram, Facebook, LinkedIn, YouTube, Website or Email. You can also save your own named presets for later use. Everything runs locally in your browser — your image never leaves your device.
Read the guide: How to resize an image for InstagramImage Resizer
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How the Image Resizer works
- Your image is loaded into an in-browser canvas — nothing is uploaded.
- Resize by exact pixels (with optional aspect-ratio lock), by percentage, or by a platform preset.
- Crop to fill or fit inside, with an optional background colour for padding.
- Set a quality level for the output, then resize and download.
- Save your own named custom presets — they stay in your browser for next time.
See also: Compress JPG, Compress PNG, Image Brightness & Contrast and Image / PDF / Document Information.
Useful tips
- Lock the aspect ratio when resizing by pixels to avoid stretching or squashing the image.
- Use platform presets to get the exact dimensions social networks expect without looking them up.
- Save custom presets for sizes you use often — they persist across visits in the same browser.
Frequently asked questions
Is my image uploaded?+
No. The image is loaded and resized entirely in your browser. Nothing is uploaded or stored.
How do I resize by exact pixels?+
Enter a width and height in pixels. Toggle the aspect-ratio lock to keep the original proportions — changing one dimension automatically updates the other.
How does percentage resizing work?+
Pick 25%, 50%, 75% or enter a custom percentage. Both dimensions scale by that factor, so a 2000×1000 image at 50% becomes 1000×500.
What presets are available?+
Instagram (square, portrait, landscape, story, profile), Facebook (cover, profile, link post), LinkedIn (cover, profile, link post), YouTube (thumbnail, banner, profile), Website (hero, standard, thumbnail) and Email (header, full-width, thumbnail). Choose Custom to enter your own dimensions.
Can I save my own presets?+
Yes. Choose the Custom platform, enter your dimensions, name the preset and click Save. Your presets are stored in your browser and remain available on future visits.
What's the difference between crop and fit?+
Crop fills the target frame by trimming the edges; fit keeps the whole image inside the frame with a coloured background padding.
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.
What would you like to do next?
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.