Free Online Image Resizer — No Upload, Instant Results
Resize any photo or image to exact pixel dimensions right in your browser. Set a custom width and height, choose from popular social media presets (Instagram, OG image, Twitter banner, Full HD), lock the aspect ratio to prevent distortion, and download in JPEG, PNG or WebP format.
Unlike cloud-based tools, everything runs locally via the HTML5 Canvas API. Your images stay on your device — there's no upload, no account needed, and no file size limit beyond your browser's memory.
Why Use Our Image Resizer?
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Real-time preview
See exactly how your resized and filtered image looks before downloading.
🔒
100% private
Your image never leaves your browser. Zero server upload, zero data collected.
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Built-in filters
Adjust brightness, contrast and saturation before downloading — no Photoshop needed.
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Social presets
One-click presets for Instagram, Twitter, OG image, Full HD and more.
How to Resize an Image
01
Upload your image
Click the drop zone or drag any JPEG, PNG, WebP or GIF file.
02
Set dimensions
Enter width and height in pixels, or pick a quick preset.
03
Adjust filters
Optionally fine-tune brightness, contrast and saturation.
04
Download
Choose JPEG, PNG or WebP and click Download. Done.
Frequently Asked Questions
What image formats are supported?▼
Input: JPEG, PNG, WebP, GIF. Output: your choice of JPEG, PNG or WebP. Use JPEG for photos, PNG for transparency or lossless, WebP for best web compression.
Does resizing reduce image quality?▼
Downscaling generally preserves quality well. Upscaling beyond the original resolution adds pixels that weren't there, causing some softness. We use high-quality canvas interpolation for best results in both cases.
Is my image sent to a server?▼
No. All processing happens in your browser using the HTML5 Canvas API. Your image never leaves your device and is never uploaded anywhere.
How does the aspect ratio lock work?▼
When the chain icon is active (green), changing width auto-updates height and vice versa. Click it to unlock and set any width/height independently.
Which output format should I choose?▼
JPEG for photos (smaller files). PNG for transparency or lossless quality. WebP for best compression ratio on the web — typically 25–35% smaller than JPEG at comparable quality, supported by all modern browsers.