Does this upload my photos to a server?

No. The entire compression runs in your browser using the Canvas API. Your photos never leave your device.

What quality setting should I pick?

75% is the sweet spot for web photos. 85% for anything where detail matters (product shots, portraits). Below 60% tends to introduce visible artifacts.

How does this compare to TinyPNG, Squoosh, or ImageOptim?

TinyPNG: server-based, free up to 20 images/day, uses sophisticated lossy compression. Squoosh (Google): browser-based like this tool, broader format support including AVIF, more granular controls. ImageOptim (Mac desktop app): batch processing, multiple algorithms applied (PNGOUT, MozJPEG, OptiPNG). For privacy-sensitive images: this tool or Squoosh (no upload). For batch processing 100+ images: ImageOptim or a build pipeline (sharp, imagemin). For one-off web optimization: any of these works; differences are marginal at typical 80-90% quality settings.

Will compression hurt SEO image rankings?

Compressed images rank better than uncompressed ones. Google's Core Web Vitals (especially LCP — Largest Contentful Paint) penalize slow-loading hero images. Quality at 80% is visually indistinguishable from 100% on most photos and loads dramatically faster. Use descriptive alt text, descriptive filenames (red-shoes.jpg vs IMG_2384.jpg), structured data (ImageObject schema), and modern formats (WebP/AVIF). Properly compressed images improve both ranking and user metrics (lower bounce rate, longer time on page).

Why does my JPG sometimes look worse after re-saving?

JPEG generation loss. Each JPG save discards information based on the quality setting. Re-saving a 90% JPG at 90% creates a 90% × 90% = 81% effective quality (visual artifacts compound). Always work from original PNG, RAW, or original-quality JPG. Never use JPG as a working format that gets re-saved repeatedly. For multi-step editing: TIFF or PSD as working format, JPG only for final delivery. Once an image has been heavily JPG-compressed, the lost detail can't be recovered.

Can I keep transparency when compressing?

JPG doesn't support transparency. Compress to PNG (lossless, preserves transparency) or WebP (supports both lossy and lossless modes, with transparency). For logos, icons, and any image with transparent areas, use WebP for the best compression. PNG-8 (limited to 256 colors) compresses better than PNG-24 for simple graphics. For photos with no transparency, JPG is much smaller — convert PNG photos to JPG for major size savings if transparency isn't needed.

File & Format Converters · Free tool

Image Compressor

Reduce JPG file sizes with a quality slider and download optimized images for emails or websites. A free, instant online compressor that works in your browser with no signup.

Updated June 2026

Drop a file or click to choose

JPG or PNG is ideal. Runs fully offline.

Drop an image to compress

JPG and PNG work best. Files never leave your browser — compression runs locally.

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What it does

A free image compressor for JPG and WebP. Drop a photo, pick a quality level, optionally cap the longest side, and get a much smaller file — everything processed in your browser with no upload. Typical 10–20 MB phone photos shrink to 300–800 KB with no visible loss.

Why bother? Slow pages lose search rank and readers. Email clients refuse large attachments. Upload forms reject files over a few MB. Re-saving at 75–85% JPG quality is the single highest-leverage image fix there is. For transparency, use our image format converter instead and save as PNG or WebP.

Embed this tool on your siteShow snippet

Paste this snippet into any page. Loads on-demand (lazy), no tracking scripts, and sized to most dashboards. Replace the height to fit your layout.

<iframe src="https://freetoolarena.com/embed/image-compressor" width="100%" height="720" frameborder="0" loading="lazy" title="Image Compressor" style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"></iframe>

Embed docs →

Example input & output

Input

Original: 12 MB JPEG (4032 × 3024)
Quality: 75%
Max dim: 2400px

Output

Compressed: 480 KB (2400 × 1800)
Size saved: 96%

Visually indistinguishable at normal viewing distances. For hero images on a landing page, this is the target.

How to use it

Drop a JPG or PNG into the upload box.
Leave Quality at 75% and Max dim at 2400px — that's the sweet spot.
Click Compress and read the size-saved percentage.
Drop the quality slider if the file still feels big.

When to use this tool

JPEG or WebP photos where small visual quality loss is acceptable.
Any image over ~500 KB headed for the web.
Re-saving phone photos (10-20 MB originals) for web or email.

When not to use it

Images that need transparency — use the PNG or WebP format converter instead.
Archival or print work where lossless is required.
Already-small images (<100 KB) — the savings will be minimal and quality may suffer.

Common use cases

Shrinking phone photos before uploading to a blog, shop, or social platform.
Getting a website page-weight below the 1MB threshold for good Core Web Vitals.
Compressing images for email attachments where file-size limits apply.
Batch-optimizing product photography before pushing to an e-commerce catalog.

Frequently asked questions

Does this upload my photos to a server?: No. The entire compression runs in your browser using the Canvas API. Your photos never leave your device.
What quality setting should I pick?: 75% is the sweet spot for web photos. 85% for anything where detail matters (product shots, portraits). Below 60% tends to introduce visible artifacts.
How does this compare to TinyPNG, Squoosh, or ImageOptim?: TinyPNG: server-based, free up to 20 images/day, uses sophisticated lossy compression. Squoosh (Google): browser-based like this tool, broader format support including AVIF, more granular controls. ImageOptim (Mac desktop app): batch processing, multiple algorithms applied (PNGOUT, MozJPEG, OptiPNG). For privacy-sensitive images: this tool or Squoosh (no upload). For batch processing 100+ images: ImageOptim or a build pipeline (sharp, imagemin). For one-off web optimization: any of these works; differences are marginal at typical 80-90% quality settings.
Will compression hurt SEO image rankings?: Compressed images rank better than uncompressed ones. Google's Core Web Vitals (especially LCP — Largest Contentful Paint) penalize slow-loading hero images. Quality at 80% is visually indistinguishable from 100% on most photos and loads dramatically faster. Use descriptive alt text, descriptive filenames (red-shoes.jpg vs IMG_2384.jpg), structured data (ImageObject schema), and modern formats (WebP/AVIF). Properly compressed images improve both ranking and user metrics (lower bounce rate, longer time on page).
Why does my JPG sometimes look worse after re-saving?: JPEG generation loss. Each JPG save discards information based on the quality setting. Re-saving a 90% JPG at 90% creates a 90% × 90% = 81% effective quality (visual artifacts compound). Always work from original PNG, RAW, or original-quality JPG. Never use JPG as a working format that gets re-saved repeatedly. For multi-step editing: TIFF or PSD as working format, JPG only for final delivery. Once an image has been heavily JPG-compressed, the lost detail can't be recovered.
Can I keep transparency when compressing?: JPG doesn't support transparency. Compress to PNG (lossless, preserves transparency) or WebP (supports both lossy and lossless modes, with transparency). For logos, icons, and any image with transparent areas, use WebP for the best compression. PNG-8 (limited to 256 colors) compresses better than PNG-24 for simple graphics. For photos with no transparency, JPG is much smaller — convert PNG photos to JPG for major size savings if transparency isn't needed.

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