Will resizing an image reduce its quality?

Downscaling (making an image smaller) generally maintains good visual quality. Upscaling (making it larger) can introduce blurriness because the tool must interpolate new pixels — the Canvas API uses bilinear interpolation which is reasonable but not as advanced as dedicated tools like Photoshop.

What does 'Lock Aspect Ratio' do?

When enabled, changing the width automatically recalculates the height (and vice versa) to maintain the original proportions of the image. This prevents the image from appearing stretched or squashed.

Which format should I choose for the output?

Use JPEG for photos where a small file size matters. Use PNG when you need transparency or lossless quality. Use WebP for the best balance of quality and compression for web use — it produces the smallest files at equivalent visual quality.

Is there a maximum image size I can resize?

There is no server-side limit since all processing is local. Very large images (over 20 MB or very high resolutions) may be slower on older devices due to browser memory constraints, but most modern devices handle them fine.

Image Resizer

Resize images to any dimension in your browser — no upload, no server, fully private.

Converters

Share this tool

f 𝕏 L

🖼️

Click or drag an image here

Supports JPG, PNG, WebP

Resize Settings

Width (px)

Height (px)

Lock Aspect Ratio

Output Format

Quality85%

Processed locally. No upload.

Why Resize Images?

Resizing images reduces file size for faster web loading, saves storage space, and ensures images fit correctly on different platforms like social media or websites.

Recommended Sizes

• Instagram Square: 1080×1080 px • Twitter/X Header: 1500×500 px • Facebook Cover: 820×312 px

Local Processing

Your images are processed entirely in your browser. No data is ever sent to our servers.

Explore More Tools

🗜️

Image Compressor

Compress images to reduce file size while maintaining quality — 100% in-browser.

⚡

Unit Converter

Convert digital storage units (Bytes, KB, MB, GB, TB).

📏

Length Converter

Convert length units (Inch, CM, Meter, Feet, etc.).

🖼️

Image Converter

Convert, resize, and compress images online. 100% private and secure.

How to Use

1
Upload your image by clicking the upload area or dragging and dropping a file.
2
Enter the desired width or height in pixels. Enable 'Lock Aspect Ratio' to automatically calculate the other dimension.
3
Choose your output format: JPEG, PNG, or WebP, and set the quality level if applicable.
4
Click 'Resize Image' and download the result.

Use Cases

Social Media Thumbnails

Resize photos to exact platform requirements — 1080×1080 px for Instagram, 1200×628 px for Facebook sharing, or 1500×500 px for Twitter headers.

Website Image Optimization

Downscale high-resolution photos to web-friendly dimensions (e.g. 1920px wide) before uploading to your CMS to improve page load speed.

Email Inline Images

Resize images to small fixed widths (600px) so they display correctly in email clients without being clipped or distorted.

Print-Ready Resizing

Resize images to precise dimensions required by print services or design templates before uploading to Canva, Photoshop, or print-on-demand platforms.

Frequently Asked Questions

Image Resizer lets you resize any image to exact pixel dimensions directly in your browser — no software needed, no uploads, and your files stay on your device.

No. All processing is done locally in your browser using the Canvas API. Your images never leave your device.

Explore More Tools

🗜️