Resize Image High Precision
Adjust image width and height in pixels or percentage with high precision.
Choose images or drag them here
We support JPG, PNG, WebP. Max size 50MB.
How to Resize an Image Online (3 Simple Steps)
Fast, secure, and completed directly in your browser in seconds.
1. Upload Your Image
Drag & drop or browse your JPG, PNG, or WebP photo into the secure dropzone. Processing is 100% in-browser.
2. Set Dimensions or Pick a Preset
Enter exact pixel dimensions (width/height), toggle aspect ratio lock, or select social media & document presets.
3. Resize & Download Instantly
Click Resize Image to process the pixels locally using hardware-accelerated Canvas with zero quality degradation.
Popular Dimensions & Presets Guide
Standard resolutions for social media platforms, web design, and official document standards.
| Use Case | Dimensions |
|---|---|
| Full HD (16:9) | 1920 × 1080 px |
| 4K Ultra HD | 3840 × 2160 px |
| Instagram Square (1:1) | 1080 × 1080 px |
| Story & Reel (9:16) | 1080 × 1920 px |
| YouTube Thumbnail | 1280 × 720 px |
| X / Twitter Banner | 1500 × 500 px |
| Facebook Cover | 820 × 312 px |
| LinkedIn Banner | 1584 × 396 px |
| Passport Photo (US & Lottery 5×5cm) | 600 × 600 px |
| Passport Photo (EU / Schengen 35×45mm) | 413 × 531 px |
| Personal Photo 4×6 cm | 472 × 709 px |
How does client-side image resizing work?
Folio uses hardware-accelerated bicubic interpolation in the browser HTML5 Canvas engine to recalculate pixel coordinates directly on your GPU and CPU. Images are resized with exact pixel precision and aspect ratio preservation without uploading raw photos across the internet.
Frequently Asked Questions
Everything you need to know about resizing images with Folio.
How do I resize an image without losing quality?
Folio uses high-quality bicubic interpolation directly inside your browser's HTML5 Canvas engine. For optimal results, lock the aspect ratio so your image doesn't stretch or distort, and choose WebP or PNG format.
Are my photos uploaded to any external server?
No. All resizing, pixel scaling, and format conversion occur 100% locally on your device. Zero bytes of your photos are ever uploaded or transmitted across the internet, ensuring complete privacy.
Which image formats can I resize?
You can upload JPG, JPEG, PNG, WebP, and HEIC files. You can output resized photos as modern WebP (compact & high quality), lossless PNG, or universal JPEG.
Is there a limit on how many images I can resize?
No! Folio is completely free to use without subscriptions, watermarks, or file count restrictions. You can resize single or multiple images as often as you need.
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