Hit a target file size
Need a 200 KB JPEG or a sub-100 KB WebP? Set a size budget and Asset Melt finds the highest-quality online compression that fits — resizing only when it has to.
Zero uploads · Free forever
Compress & convert images onlineClient-side, in your browserAssetMelt
Free online image compressor for JPEG, PNG, WebP, AVIF, and HEIC. Convert HEIC to JPG in your browser, shrink file sizes with size-budget encoding, or batch-export a whole folder — no uploads, no accounts, just WASM codecs running locally on your device.
MozJPEGAVIFWebPOxipngJXLQOIHEICWASM
Online image compressionwithout uploading a single byte
Compress images online, convert HEIC to JPG, resize for the web, and export batches — a full client-side image pipeline, free forever.
Modern format conversion
Compress to AVIF or WebP, export lossless PNG, or convert HEIC to JPG in the browser. MozJPEG, Oxipng, JXL, and QOI — the same WASM engines as Google Squoosh.
Resize, crop & transform
Online image editing without uploads: Lanczos resize, aspect-ratio crop, rotate, flip, and brightness/contrast filters — plus advanced codec controls when you need them.
Platform & social presets
One-click OG images, Instagram sizes, and favicon kits at exact dimensions. Save your own presets or import a JSON pipeline for repeatable client-side compression.
Batch compress online
Drop a folder, queue dozens of files, and compress images online in one pass. Compare before/after, then download individually or as a ZIP with per-file byte savings.
Installable app, offline on demand
Add Asset Melt to your home screen for a focused studio experience. Offline mode is optional — download the pack once when you want plane-ready compression.
Compress images onlinein three steps
Open the studio, run client-side image compression on your whole queue, and download — no signup, no upload step, no waiting on a server.
Drop images to compress
Add photos from your device — JPEG, PNG, WebP, AVIF, HEIC, GIF, SVG, and more. Everything decodes locally in a Web Worker; nothing is sent to a server.
Choose how to compress
Pick Web Optimized or convert HEIC to JPG in the browser. Set a size budget, resize for the web, crop to a social preset, or tune AVIF/WebP quality by hand.
Download smaller files
Compare the original side-by-side with your compressed output, check byte savings, then export one file or batch-download a ZIP of every optimized image.
Client-side image compressionpowered by Squoosh-grade WASM
Every encode and resize runs in your browser — AVIF, WebP, MozJPEG, Oxipng, JPEG XL, HEIC decode, and more. Faster than cloud tools because your files never travel.
MozJPEGAVIFWebPOxipngJPEG XLQOILanczos3Magic KernelHEIC decodeWeb WorkersWASM codecsSize budget
Image compression guidesthat respect your privacy
Practical write-ups on browser-based workflows, modern formats, and getting smaller files without cloud uploads.
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AVIF vs WebP in 2026: Which Format Should You Use?
Choosing between AVIF and WebP is one of the most common questions in modern front-end performance work. Both beat JPEG on compression efficiency. Both work in…
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Everything you need to know before opening the studio.
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