Image Compressor

Overview

Images dominate web page size — typically 50–80% of total bytes loaded. Compressing them aggressively without visible quality loss is one of the highest-impact performance wins available. Modern codecs like WebP and AVIF compress 25–50% better than JPEG at the same visual quality, but you need the right encoder settings. This compressor works in your browser using the Canvas API and modern codecs, supporting JPEG, PNG, WebP, and AVIF. Drop multiple images, set quality target, get optimized files instantly.

How to Use (Step by Step)

1. 1

   Drop one or more images

   JPG, PNG, WebP all supported. Multi-file is fine — each gets its own settings if you want.

2. 2

   Pick a quality target

   75–85% quality is invisible to the eye on most photos but cuts file size by 50–70%. Logos and screenshots may need higher quality (90+) to avoid artifacts.

3. 3

   Download the compressed file

   Original vs compressed sizes are shown side by side. Files never upload — compression happens locally in your browser.

How It Works

The tool decodes the source image (JPEG, PNG, HEIC, etc.), then re-encodes using the browser's native codec at your chosen quality level (0.1 to 1.0). For JPEG/WebP/AVIF, lower quality = smaller file with progressively more compression artifacts. PNG is lossless; the compressor reduces its size via better palette indexing or by converting to lossless WebP. The original image is never uploaded — everything happens locally.

When to Use This

Optimizing photos for web upload (blog posts, social media). Preparing email attachments (most providers limit 25MB). Reducing storage costs on cloud (S3, Cloudinary). Compressing screenshots for documentation. Batch-processing folders of holiday photos before sharing. Replacing oversized hero images on websites — a single hero image at 5MB versus 200KB is the difference between fast and slow page loads.

Frequently Asked Questions