Batch friendly
Process up to 20 images using the same settings.
● Private · Fast · No uploadsImage compressor
Image compressor
& resizer
Compress, resize and convert up to 20 images without sending them to a server.
✓ No sign-up✓ Browser-based✓ Instant results
01 · Choose settings
Prepare your images
Everything stays on your device
Private image processing, built into your browser
Utilaroo uses your browser’s canvas technology. Files are not uploaded, stored or transmitted.
Aspect ratio protected
Images resize within your limits without stretching.
Transparent results
Compare original and output sizes before downloading.
Method, example and limitations
Understand the result before using it
Use this tool to reduce image dimensions, change a browser-supported format or lower lossy-image quality before sharing or publishing. Processing occurs on the device, so source files are not uploaded to Utilaroo.
What the tool does
The browser decodes each selected image, calculates output dimensions without exceeding the requested bounds, draws the resized pixels to a canvas and encodes the result in the chosen format. Quality affects JPG and WebP encoding; PNG is lossless and may remain larger for photographs.
Resize a 4000 × 3000 photograph
- A 2000 px maximum width produces 2000 × 1500 output.
- The dimensions are halved, leaving one quarter of the original pixel count.
- File-size reduction still depends on image detail, format and quality—not pixel count alone.
How to read it: Choose dimensions for the final use rather than chasing the smallest possible file. Repeated lossy compression can introduce blur, ringing and colour damage.
- The browser can decode the source format.
- Aspect ratio is preserved unless the source or output workflow explicitly crops.
- Metadata retention varies because browser canvas export focuses on image pixels.
- Expecting a guaranteed percentage reduction.
- Upscaling a small source and expecting new detail.
- Using low-quality JPG for text, logos or screenshots that need crisp edges.
Use current primary information for decisions affected by laws, tariffs, product specifications or professional standards.