Compress Images Online — Free, Private, No Upload

Why compress images?

Images are typically the largest assets on any web page. A single uncompressed JPEG from a modern smartphone can be 4–8 MB. That same image, properly compressed, can be under 200 KB with no visible difference to the human eye.

Compressing images before publishing them online has a direct impact on:

• Page load speed — smaller images load faster, especially on mobile networks
• Google rankings — Core Web Vitals (LCP) is directly affected by image size
• Storage costs — fewer bytes stored means lower S3, Cloudflare, or CDN bills
• User experience — pages that load in under 3 seconds have significantly lower bounce rates
• Bandwidth costs — especially important for high-traffic sites

For a deeper dive into format choices, see our guide on JPEG vs PNG vs WebP — which format is best?

How to compress images online in 3 steps

1. Open the image compressor — go to tinybench.dev/tools/image-compressor/
2. Drop or select your image — drag a JPEG, PNG, or WebP file onto the drop zone, or click to browse
3. Adjust quality and download — use the quality slider to find the right balance, then click Download

Image formats explained

For most web images, WebP gives the best results — up to 30% smaller than JPEG at the same quality. All modern browsers support WebP. If you need broad compatibility or the image will be used in email, stick with JPEG. See our full JPEG vs PNG vs WebP comparison for more detail.

What quality setting should I use?

The quality slider controls how aggressively the image is compressed. Higher quality = larger file. The sweet spot for most web images is 70–85%:

• 85–100% — near-lossless, large files. Use for print or professional photography.
• 70–85% — excellent quality, significantly reduced size. Best for most websites.
• 50–70% — visible compression on close inspection. Good for thumbnails.
• Below 50% — noticeable quality loss. Use only for tiny previews or placeholders.

How to reduce image file size without losing quality

Truly lossless compression (reducing file size with zero quality change) is possible but limited. Here are techniques that reduce size without visible quality loss:

• Strip metadata (EXIF) — photos from cameras and phones contain GPS coordinates, camera model, timestamp and more. Stripping this metadata alone can reduce file size by 10–20% with zero visual change.
• Convert to WebP — switching a JPEG to WebP at the same quality produces a 25–35% smaller file.
• Resize before compressing — if you're displaying an image at 800px wide, there's no reason to serve a 3000px wide original. Resize first, then compress.
• Use 80% quality for JPEG — at 80%, JPEG compression artefacts are invisible to most people. The file is typically 60% smaller than the original.

For PNG-specific techniques, read our guide on how to compress PNG without losing quality. For email-specific limits, see how to reduce image size for email.

Compress images for web performance

Google's PageSpeed Insights and Core Web Vitals directly penalise pages with oversized images. The Largest Contentful Paint (LCP) metric measures how long your main image takes to load — compressing that image is one of the fastest ways to improve your LCP score.

A good target for web images:

• Hero images: under 200 KB
• Blog post images: under 100 KB
• Thumbnails: under 30 KB
• Icons and logos: under 10 KB (consider SVG instead)

Frequently asked questions

Related tools & guides

• Image Compressor — free, browser-based, no upload
• Color Contrast Checker — check WCAG accessibility contrast ratios
• CSS Beautifier & Minifier — format or minify CSS
• Compress PNG Without Losing Quality
• JPEG vs PNG vs WebP — Which Format is Best?
• Reduce Image Size for Email