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Image Compress

Reduce image file size with a live quality slider.

Select an image

or drag & drop it here

100% In-Browser Memory • Zero Uploads
Complete Guide

About the Image Compressor

Shrink a photo's file size while keeping it looking sharp — useful the moment a form or portal tells you your image is too large. Drop in a JPG, PNG or WebP, drag the quality slider and watch the new file size update live beside the original. Choose JPG or WebP output, download when the number looks right, and nothing has left your device at any point.

Where smaller files matter

File-size ceilings appear everywhere in Indian daily internet use: government portals cap uploads at 50–200 KB, email attachments choke on multi-megabyte camera photos, and a blog page full of heavy images crawls on 4G. Marketplace listings load faster and rank better when images are lean. In every case the fix is the same — re-encode the image at a lower quality setting, keeping the pixels identical but throwing away data your eye will not miss.

How the compression works

The tool redraws your image onto an offscreen HTML5 canvas at its original width and height, then asks the browser's native encoder to write it out again at your chosen quality. Because the encoder is the same one built into Chrome, Firefox or Safari, there is no upload, no queue and no waiting for a server. Every move of the slider re-encodes instantly and shows the resulting size next to the original, including the percentage saved — so you judge with real numbers instead of guessing. Pixel dimensions never change here; if you also need the image smaller physically, use Image Resize afterwards.

JPG or WebP?

Both buttons re-encode lossily, but they behave differently. JPG is universally accepted — every portal, app and decade-old office computer opens it. WebP typically produces files 25–35% smaller at the same visual quality and even supports transparency, but a few older portals reject the format. Practical rule: pick WebP when you control where the image goes (your website, a chat, storage) and JPG when a form or third party demands maximum compatibility. Note that choosing JPG flattens any transparent areas onto solid white, since JPEG cannot store transparency.

Practical tips

A few habits get you to the smallest acceptable file fastest:

  • Start near 70% quality — for photos it usually halves the size with no visible difference.
  • For exam-form style targets in kilobytes, use the dedicated Photo Resize in KB tool, which locks both dimensions and size automatically.
  • If the file barely shrinks, it was probably already well compressed; try WebP or reduce dimensions instead.
  • Screenshots and graphics with flat colours compress far better than photographs at equal quality.

Video slot: image-compress-walkthrough.mp4

A screen recording of a large phone photo being dropped in, the quality slider dragged until the live counter drops under a portal limit, and the compressed file downloading.

Coming soon
Simple Step-by-Step Guide

How to Use Image Compressor Online

Follow these simple steps to use Image Compressor securely in your web browser.

  1. 1

    Select and Upload Image

    Drag and drop any JPG, PNG, or WebP image into the local compressor drop zone.

    01-image-compress-select-and-upload-image.png

    Replace with a real capture

  2. 2

    Adjust Quality Slider

    Adjust the quality percentage slider to balance file size reduction and image clarity.

    02-image-compress-adjust-quality-slider.png

    Replace with a real capture

  3. 3

    Download Compressed File

    Click download to save the compressed image file directly to your computer.

    03-image-compress-download-compressed-file.png

    Replace with a real capture

Technical Specs

Features & Specifications

Engine

HTML5 Canvas 2D toBlob API

Supported Formats

JPEG, PNG, WebP

Compression Range

1% to 100% Quality

Privacy Status

100% In-Browser Local Processing

100% Free & Private In-Browser Processing

Rupix operates on a zero-upload architecture. All computations, file parsing, and transformations occur locally inside your web browser. No document bytes, sensitive text, or personal data are ever uploaded or transmitted to remote servers.

Highlights

Why use Rupix Image Compressor?

Live Quality Slider

Instant side-by-side comparison of original file size vs compressed output size.

Multi-Format Canvas Engine

Compress JPEG, PNG, and WebP formats utilizing browser-native rasterization.

Lossless / Lossy Balance

Smart quantization algorithms reduce file size significantly while retaining high visual fidelity.

Q&A

Frequently Asked Questions

Your image is drawn onto an offscreen HTML5 canvas and re-encoded by the browser's native encoder at your chosen quality. No server, no upload — the whole loop happens in your browser tab.
No. Width and height stay exactly the same; only redundant colour data is discarded. To change pixel dimensions, use the Image Resize tool separately.
Zero bytes leave your device. Processing happens in browser memory, and the download comes straight from that memory to your disk.
WebP almost always wins — expect roughly 25–35% less size than JPG at matching visual quality. Pick JPG only when the destination requires strict compatibility.
It controls how aggressively the encoder discards fine detail. Lower values shrink the file further but eventually create blur or blocky artefacts around edges; the live preview lets you find the last value that still looks clean.
Images that were already optimised have little redundancy left to remove. If you need a hard size target, reducing the pixel dimensions with Image Resize will shrink the file much more than quality alone.
Yes. Choose WebP to keep the transparency, or JPG if you do not mind the transparent areas becoming solid white.