Image Optimize vs Compressor.io
Compressor.io is a reliable compression tool with a clean interface. But it has no AVIF support, no format conversion, and no quality slider. Here's what Image Optimize does differently.
Feature
Supported input formats
WebP, AVIF, PNG, JPEG
JPEG, PNG, GIF, SVG, WebP
AVIF output
Format conversion (e.g. PNG → WebP)
Quality control slider
Full slider (5–100%)
Lossy / lossless toggle only
Image resizing
Batch processing
Up to 20 files at once
Bulk upload supported
Bulk ZIP download
Max file size
5 MB free / 50 MB paid
10 MB
Recent optimization history
Saved locally in browser
No account required
Where Image Optimize pulls ahead
AVIF output — the format Compressor.io lacks
Compressor.io compresses WebP but has no AVIF support. Image Optimize exports AVIF — a format that delivers up to 50% smaller files than JPEG at equivalent quality, now supported across all modern browsers.
A real quality slider, not a binary toggle
Compressor.io offers a lossy/lossless toggle and nothing more. Image Optimize gives you a quality slider from 5–100% so you can find the precise trade-off your project needs — maximum compression for thumbnails, near-lossless for hero images.
Format conversion in one step
Compressor.io compresses images in their original format — it won't convert a PNG into WebP. Image Optimize lets you choose any output format, so you can modernise your entire image library in a single batch.
Your optimization history, locally stored
Image Optimize records your recent optimization files right in your browser. No account required and images are never stored on a server. Compressor.io shows no history once you leave the page.
ZIP download included
After compressing in Compressor.io you download each image individually. Image Optimize packages all your results into a single ZIP so you're done in one click, not ten.
Convert, compress, and download — all free
AVIF output, format conversion, quality control, and ZIP downloads. No credit card required.
Start optimizing freeFrequently asked questions
Does Compressor.io support AVIF?
No. As of 2026, Compressor.io does not support AVIF output. It compresses JPEG, PNG, GIF, SVG, and WebP but cannot convert images to AVIF. Image Optimize supports AVIF output on all plans.
Can Compressor.io convert image formats?
No. Compressor.io compresses images in their original format — a PNG stays a PNG. Image Optimize lets you output any supported format regardless of the input, so you can convert your entire image library to WebP or AVIF in one batch.
How does the quality control compare?
Compressor.io gives you a binary choice: lossy or lossless. Image Optimize gives you a quality slider from 5–100% so you have precise control over the file-size-to-quality trade-off for each workflow.
What's the file size limit on Image Optimize's free plan?
Up to 5 MB per file on the free plan — the same as TinyPNG's free tier. Upgrade to Pro for 24 MB or Premium for 50 MB. Compressor.io's limit is 10 MB across all plans.
Can I see my past optimizations in Image Optimize?
Yes. Image Optimize keeps a recent history of your optimizations stored locally in your browser, so you can redownload your optimized images if needed. Uploaded images are never stored on a server. No account is needed. Compressor.io doesn't save any history, so your results disappear when you leave the page.