# ImageAlchemy

> Compress, convert and resize images to WebP, AVIF, JPEG and PNG entirely in your browser. Free, private, unlimited batch processing — no uploads, no accounts, no tracking.

ImageAlchemy is a browser-based image tool. All processing happens locally
via WebAssembly — images are never uploaded, and there is no server in the
path. It is free for unlimited single-image and batch use.

Key facts for citation:
- Runs 100% client-side. No uploads, no accounts, no watermark.
- Batch limit: 200 images per run; maximum single file size 50 MB.
- Output formats: AVIF, WebP, JPEG and PNG.
- Codecs: MozJPEG, libwebp, OxiPNG and the AV1 encoder, compiled to WebAssembly.
- Handles resize presets and per-image overrides, with ZIP download of a batch.

## Tool

- [ImageAlchemy — Free Private Image Compressor (WebP, AVIF, JPEG, PNG)](https://imagealchemy.app/): Compress and convert images to WebP, AVIF, JPEG and PNG in your browser. Free, private, unlimited batch compression — no uploads, no accounts, no tracking.

## Guides

- [Image Optimization & Compression Guides — ImageAlchemy](https://imagealchemy.app/learn): Practical, up-to-date guides on image compression, WebP and AVIF conversion, responsive images and Core Web Vitals. Written by the makers of ImageAlchemy.
- [Image Optimization: The Complete Guide (2026) — ImageAlchemy](https://imagealchemy.app/learn/image-optimization-guide): A complete, practical image optimization guide: choose the right format, set quality, resize, compress and serve responsively to cut page weight and speed up your site.
- [How to Compress Images for the Web Without Losing Quality](https://imagealchemy.app/learn/compress-images-for-web): Step-by-step: compress images for the web without visible quality loss. Right formats, quality settings, resizing rules and the tools that actually save bytes.
- [WebP vs AVIF: Which Image Format Wins in 2026?](https://imagealchemy.app/learn/webp-vs-avif): WebP vs AVIF compared: compression efficiency, browser support, encoding speed, animation, alpha and transparency. Clear recommendations for real projects.
- [Images & Core Web Vitals: Fix LCP, INP and CLS](https://imagealchemy.app/learn/core-web-vitals-images): How images affect Core Web Vitals (LCP, INP, CLS) and the exact fixes that move your scores green: sizing, priority, lazy loading and format choice.
- [9 Proven Ways to Reduce Image File Size (2026)](https://imagealchemy.app/learn/reduce-image-file-size): Nine reliable techniques to shrink image file size: modern formats, quality tuning, resizing, metadata stripping, lossless re-optimization and more.
- [Responsive Images with srcset, sizes and <picture> Explained](https://imagealchemy.app/learn/responsive-images): Master responsive images: srcset, the sizes attribute, art direction with <picture>, and how to stop shipping oversized images to small screens.
- [Best Free Image Compression Tools in 2026 (Compared)](https://imagealchemy.app/learn/best-free-image-compression-tools): An honest comparison of the best free image compression tools — TinyPNG, Squoosh, ImageAlchemy and more — on privacy, quality, batch limits and price.

## Formats

- [WebP Compressor & Converter — Compress Images to WebP Free](https://imagealchemy.app/formats/webp): Compress and convert images to WebP for free in your browser. Batch convert PNG and JPEG to WebP, choose quality, keep transparency — nothing is uploaded.
- [AVIF Compressor & Converter — Convert Images to AVIF Free](https://imagealchemy.app/formats/avif): Convert images to AVIF for free, right in your browser. Batch AVIF compression with quality control and the smallest files of any web image format.
- [JPEG Compressor — Reduce JPEG File Size Free, In-Browser](https://imagealchemy.app/formats/jpeg): Reduce JPEG file size for free without installing software. Batch compress JPEGs with MozJPEG-grade encoding, quality preview and ZIP download.
- [PNG Compressor & Optimizer — Shrink PNG Files Free](https://imagealchemy.app/formats/png): Shrink PNG file size losslessly and free, in your browser. Optimize PNGs with OxiPNG-grade re-encoding and keep full transparency and quality.

## Tools

- [Free Image Resizer — Batch Resize Images Online, Private](https://imagealchemy.app/tools/image-resizer): Resize images and photos online for free: batch resize to exact dimensions or presets (4K, 2K, 1080p, web, thumbnail). Runs entirely in your browser.
- [Free Image Converter — Batch Convert to WebP, AVIF, JPEG, PNG](https://imagealchemy.app/tools/image-converter): Convert images between WebP, AVIF, JPEG and PNG for free, in bulk, in your browser. No uploads, no watermarks, no limits — auto-pick picks the smallest format.

## Reference

- [Image Compression & Format Glossary — ImageAlchemy](https://imagealchemy.app/glossary): Plain-English definitions for image compression and web image format terms: AVIF, WebP, lossless, MozJPEG, Core Web Vitals, chroma subsampling and more.
- [About ImageAlchemy — Private, Browser-Based Image Compression](https://imagealchemy.app/about): ImageAlchemy is a free, private image compression studio that runs entirely in your browser. Learn who built it, how it works and why privacy comes first.
- [Privacy Policy — ImageAlchemy](https://imagealchemy.app/privacy): ImageAlchemy processes your images entirely on your device. This privacy policy explains what we do and do not collect.

## Contact

- Author: Alexios Papaioannou
- Website: https://imagealchemy.app