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ConvertSwift
Browse Tools
100% Secure: Processed locally in your browser. No files are uploaded to our servers.

Free Online Image Resizer

Change scale dimensions, pixel sizes, and check quality in real time. Batch processing and clipboard pasting support included.

Drag & drop files here, click to browse, or paste image with Ctrl+V

Supports PNG, JPG, WebP, SVG, BMP, and GIF
Original Image
original
4000 × 3000 px (4.2 MB)
Resized Output
resized preview
1200 × 900 px (320 KB)
100%

Original: 4.2 MB (4000x3000) ➔ New: 320 KB (1200x900)

One-Click Presets
Resize Settings
Target File Size (Optional)
Export Format
80%

How to resize images locally?

Resizing an image on ConvertSwift takes just three quick steps, entirely without internet dependencies once the site is loaded:

  • Select your local JPG, PNG, or WebP file.
  • Enter your target pixel width/height or drag percentage sliders.
  • Click 'Resize Image' and download the scaled version instantly in your browser tab.

Why client-side image scaling is safer

Typical web tools require you to upload photos to a remote system where they are saved and converted. For personal snapshots or private business graphics, this presents security breaches.

ConvertSwift uses standard browser Canvas rendering context libraries. Your image is imported locally into RAM, redrawn at the requested scale, and downloaded directly—ensuring absolute privacy.