LossLessimg.com
API Docs
Up to 20 images, max 5 MB each.
Drop your
WebP, PNG, JPEG, AVIF, SVG or GIF
files here!

Smart, Lossless Bulk Image Optimizer & Format Converter

Optimize WebP, AVIF, PNG, JPEG, SVG, and GIF images instantly. Boost your site speed, improve Google Core Web Vitals, and save on hosting bandwidth.

What does LossLessimg.com do?

LossLessimg.com uses intelligent compression algorithms to shrink image files without losing visual clarity. By analyzing pixels, stripping unnecessary metadata, and selectively reducing colors, it cuts file sizes by up to 70% or more while keeping the image looking original.

Why is image compression crucial?

Fast load times are essential for a good user experience and high search engine rankings. Heavy, unoptimized images are the single biggest cause of slow web pages. Compressing your assets ensures mobile responsiveness, reduces bandwidth costs, and improves SEO scores.

Is there a developer API?

Yes. Pro users can generate secure API tokens (Laravel Sanctum) to integrate high-speed image compression into their codebases, CMS platforms, or build pipelines. The API provides raw, unmodified lossless encoding for premium automated workflows.

Can anyone tell the difference?

We don't think so. Below is a side-by-side comparison of a transparent PNG image. The left side is the raw design file, and the right side is the optimized version processed by our algorithms. While the visual details, alpha transparency, and colors are identical, the file size is slashed by 94%.
Original transparent PNG sloth image
Original 24-bit PNG
66 KB
VS
Optimized transparent PNG sloth image
Compressed 8-bit PNG
3.8 KB (-94%)

How does it work?

When you upload a PNG, our system uses color quantization. It groups similar colors and maps them to an 8-bit index instead of 24-bit space, removing hidden metadata in the process. This maintains full transparency while reducing the footprint to a fraction of the original size.

Are modern next-gen formats supported?

Absolutely. LossLessimg.com fully supports modern formats like WebP and AVIF. These formats are universally supported by all major browsers (Chrome, Safari, Firefox, Edge) and deliver even better compression than traditional JPEG or PNG without introducing artifacts.

Can I optimize animated PNGs (APNG) and GIFs?

Yes. Animated images are often incredibly heavy. Our optimizer strips duplicate frames and compresses loop sequences, letting you embed lightweight animated stickers or loop animations under 500 KB to keep mobile apps and landing pages fast.
LossLessimg.com Optimizer Web Application Interface Screenshot

Streamline Your Web Development Workflow

Save Directly to Web Formats

Skip the manual exports in image editors. Simply drop your source files into our interface to optimize them instantly. You can compress multiple formats in one go, downloading a structured ZIP file that is ready for production deployment.

Intelligent Next-Gen Conversions

Transition seamlessly from old formats. Convert PNG, JPEG, or GIF files into next-generation WebP or AVIF formats on the fly. Background transparency and smooth gradients are preserved, giving you modern compliance in one step.

Worry-Free Color Management

Never worry about washed-out colors. Our optimizer automatically standardizes images to sRGB profiles. This guarantees that your product photographs, brand assets, and UI components look exactly as intended on every display.

Simple, Transparent Pricing

Compress unlimited images and upgrade your workflow today.

Free Account

Ideal for registered users with occasional optimization tasks.

$0 / always free
  • Unlimited web image compressions
  • Queue up to 20 files
  • Max size 10 MB per file
  • Optimize WebP, PNG, JPEG, SVG, GIF
  • Files retained for 2 hours
  • AVIF compression
  • WebP, JPEG, AVIF Converter
  • High-volume Developer API

Pro Account (Monthly)

Ideal for professional designers, web agencies, and developers.

$5 / month
  • Unlimited image uploads
  • Queue up to 1,000 files
  • Max size 150 MB per file
  • Optimize all formats (including AVIF)
  • WebP, JPEG, AVIF Converter
  • Optimize from webpages & live URLs
  • 10,000 free API compressions/mo
  • Priority premium developer support

Trusted by thousands of companies around the world