Image Compressor — Reduce File Size
Compress JPG, PNG, WEBP images online free. Adjustable quality slider. No uploads — compressed locally in your browser. Reduce file size by up to 80%.
How to Use — 3 Simple Steps
Set quality level
Use the slider to choose quality. 75–80% is ideal for web — great visuals, small file.
Choose format
Pick JPG for compatibility, WEBP for smallest size, or AVIF for best efficiency.
Upload & download
Upload images and download compressed versions instantly. Batch processing supported.
Why Use SiteConversor?
Up to 80% Smaller
Reduce image file sizes dramatically with no visible quality loss at 75%+ settings.
Adjustable Quality
Slider from 10% to 100%. Precisely control the size/quality trade-off.
Private Processing
Compression happens entirely in your browser. Images never leave your device.
Batch Mode
Upload and compress multiple images in a single operation.
About This Tool
Image file size directly impacts website speed, email deliverability, storage costs, and user experience. A typical smartphone photo is 3–8 MB. A web page with 10 uncompressed images could be 30–80 MB — unacceptably slow. Proper compression reduces that to 2–5 MB with no visible difference.
Our compressor lets you precisely control the quality/size trade-off. The 75% setting typically reduces file size by 50–70% while preserving all detail visible to the human eye at normal screen sizes.
Beyond quality, format matters. JPG is universal and ideal for photographs. WEBP achieves 25–35% better compression than JPG — it's now supported by all modern browsers and should be the default for any new website. AVIF is even more efficient, supported by Chrome and Firefox.
All compression happens locally using the HTML5 Canvas API. Your images — personal photos, business assets, client files — are never transmitted to any server.
Frequently Asked Questions
What quality setting should I use? expand_more
For web publishing, 75–80% is ideal — files are 50–70% smaller with excellent quality at normal screen sizes. For print or professional use, use 90–95%.
JPG vs WEBP: which should I choose? expand_more
JPG is universally compatible. WEBP is 25–35% smaller than JPG at equivalent quality — ideal for websites targeting modern browsers. For email or universal sharing, JPG is safer.
Does compressing make images blurry? expand_more
At 70%+ quality, artifacts are not visible at normal viewing sizes. Below 60%, you may see 'blockiness' around edges. We recommend 75% as the minimum for professional use.
Can I compress PNG files? expand_more
Yes. For PNG output, we apply lossless optimization. For smallest PNG-compatible sizes, convert to WEBP instead — much better compression ratios.
Why is my image getting larger after compression? expand_more
This can happen with already-compressed images. Re-compressing a JPG at higher quality than the original may produce a slightly larger file. Reduce quality or switch to WEBP.
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