🖼️ Image Tools

Image Resizer — Resize Photos, Free & Private

Resize any image to exact pixel dimensions or a percentage, with sharp Lanczos3 resizing — no blurry, blocky downsizing. Everything runs locally in your browser.

✓ Free forever✓ No upload✓ No signup✓ Sharp Lanczos resize

🖼️

Drop an image here

or click to browse · JPG, PNG, WebP

Loading resize engine…

✅

Resize complete!

⬇ Download

Quick answer: Resize an image to exact pixel dimensions or a percentage — 100% free, browser-based, no upload required. Convertlo uses Pica's Lanczos3 algorithm for sharp results when shrinking images, and saves your resized image in the original format.

How to Resize an Image

Upload Your Image

Drop your JPG, PNG, or WebP onto the tool, or click to browse and select it.

Set New Dimensions

Enter an exact width and height, or click a percentage or pixel-width preset.

Lock Aspect Ratio

Keep the lock 🔗 on to resize proportionally, or unlock to set width and height independently.

Resize & Download

Click "Resize Image" — Convertlo resizes it sharply with Pica and gives you a download link.

Why Use Convertlo to Resize Images?

🔒 100% Private — files never leave your browser, zero server uploads
🆓 Free forever — no account, no watermark, no file size cap per session
✨ Lanczos3 sharpening — far sharper than basic browser canvas scaling
🔗 Aspect ratio lock — resize proportionally with one click
📐 Quick presets — 75%, 50%, 25%, or common widths like 1920/1280/800px
📱 Works on mobile — works on any device with a modern browser

Features

🔒

100% Private

No server. No upload. Your image stays on your device the whole time.

✨

Sharp Resizing

Pica's Lanczos3 algorithm keeps detail crisp when shrinking images.

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Aspect Ratio Lock

Resize proportionally, or unlock for custom dimensions.

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Quick Presets

One-click 75%, 50%, 25%, or common pixel widths.

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Format-Preserving

JPG, PNG, and WebP stay in their original format.

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Mobile-Ready

Works on iPhone, Android, tablet, and desktop.

Frequently Asked Questions

Yes — completely free, no limits, no watermarks, no account required. Convertlo runs entirely in your browser using Pica.

No. All resizing happens locally in your browser. Your image never leaves your device.

Convertlo uses Pica's Lanczos3 algorithm, which produces noticeably sharper results when shrinking images compared to a browser's default bilinear scaling — especially for photos with fine detail or text.

Yes. Enter the exact width and height you need in pixels. Lock aspect ratio to keep the image proportional, or unlock it to set width and height independently (this may stretch the image).

JPG, PNG, and WebP are all supported for both input and output. The resized image is saved in the same format as your original by default.

Usually yes — smaller dimensions generally mean a smaller file. If you also need to compress without resizing, use Convertlo's Image Compressor for fine-grained quality control.