Image Resizer.
Resize images to any dimension or social media preset — no upload, no account, nothing leaves your device.
Resizing happens on a canvas in this tab — the file is never uploaded.
Social media size guide.
Current recommended dimensions for the placements people resize for most.
| Platform | Size | Ratio | Notes |
|---|---|---|---|
| Instagram post | 1080 × 1080 px | 1:1 | Square feed post |
| Instagram story | 1080 × 1920 px | 9:16 | Vertical full-screen |
| Instagram landscape | 1080 × 566 px | 1.91:1 | Landscape feed post |
| Twitter/X post | 1200 × 675 px | 16:9 | In-feed image |
| Twitter/X banner | 1500 × 500 px | 3:1 | Profile header |
| LinkedIn cover | 1584 × 396 px | 4:1 | Company/personal page |
| LinkedIn post | 1200 × 627 px | 1.91:1 | Shared link image |
| YouTube thumbnail | 1280 × 720 px | 16:9 | Min 640 × 360 px |
| YouTube banner | 2560 × 1440 px | 16:9 | Channel art |
| Facebook cover | 820 × 312 px | 2.63:1 | Personal profile |
| Facebook post | 1200 × 630 px | 1.91:1 | Shared image |
| Pinterest pin | 1000 × 1500 px | 2:3 | Vertical pin |
Capabilities
What You Get
Exact dimensions or a known-good preset, resized on-device with the aspect ratio kept honest.
Any Dimension
Set an exact pixel width and height for the output.
Ratio Lock
Keep proportions locked so resized images never look stretched.
Platform Presets
Jump straight to the correct size for common social placements.
Quality Preserved
Canvas resampling keeps output sharp rather than blocky.
Instant Download
Save the result immediately with no processing queue.
Never Uploaded
Images are read and written locally — safe for client work.
Related tools.
More free browser-based utilities, connected by category and use case.
Image Compressor
Drag and drop JPG, PNG, or WebP images and compress them entirely in-browser using the Canvas API. Shows original vs compressed size and savings percentage. Nothing uploaded anywhere.
Color Picker & Palette
Full-featured color picker with HEX, RGB, HSL, and CMYK output. Upload an image to extract the 5 dominant colors as a palette. Copy any value with one click.
Meme Generator
Choose from popular meme templates or upload your own image. Add top and bottom text with font size and color controls. Download as PNG. Simple and fast.
FAQ
Image Resizer FAQ.
Are my images uploaded to a server?
No. This tool runs entirely in your browser using the HTML5 Canvas API. Your images never leave your device — nothing is uploaded, stored, or transmitted to any server. Your privacy is fully preserved.
What image formats can I resize?
You can upload any image format your browser supports — JPEG, PNG, WebP, GIF, BMP, AVIF, and more. You can export the resized image as JPEG, PNG, or WebP. JPEG supports quality control (1–100); PNG and WebP use lossless compression.
What does 'lock aspect ratio' mean?
When aspect ratio is locked, changing the width automatically updates the height (and vice versa) to maintain the original image proportions. This prevents distortion. Toggle the lock off to resize to any arbitrary dimensions freely.
Can I resize to social media sizes?
Yes. The tool includes one-click presets for Instagram posts (1080×1080), Instagram stories (1080×1920), Twitter/X banners (1500×500), LinkedIn covers (1584×396), YouTube thumbnails (1280×720), and Facebook covers (820×312).
What JPEG quality setting should I use?
For web publishing, a quality of 80–90 gives an excellent balance of file size and visual quality. For print or archival use, set it to 95–100. Quality 60–75 is suitable for thumbnails and previews where file size is the priority.
Does resizing to a larger size improve image quality?
No. Upscaling (making an image larger than its original dimensions) does not add detail — it only interpolates existing pixels, which can make the image appear blurry or pixelated. For best results, always start with the highest-resolution original available.
