Convert and compress images to AVIF via canvas encoding with 4 presets — Web 1920px/q60, Balanced 2048px/q75 (default), High Quality 3000px/q85, Maximum original-size/q95 — plus free quality (10–100) and max-width (0–4000, 0 = Original) sliders that decouple the preset. Only wider images downscale; single saves as optimized.avif, batches as *.avif in avif-images.zip — local work, 2 free batches a day.
Runs on CanvasJSZip
Content reviewed October 2026 · About Toolzum
Convert image batches between JPG, PNG, WebP, and AVIF outputs (JPEG/PNG/WebP/AVIF/HEIC/HEIF/GIF/BMP/ICO/SVG inputs; HEIC via heic2any, SVG rasterized at intrinsic size or 1024px fallback) with a quality slider (10–100, default 80). Pair pages (?from/?to) preset the output. Flat ZIP renamed per file — local, 5-file guest batches, 25 signed-in, 500 Pro.
Downscale a batch of images to one max width (default 1920px) with an optional bottom-right watermark, then download everything as a ZIP. Same max-width and watermark apply to every image — local Canvas work, 3 free images a day.
Rasterize SVG vectors to crisp PNGs at 1x, 2x (default), 3x, or 4x scale — base size read from the SVG width/height attributes (100px fallback) — with filename preservation (.svg becomes .png). Developers ship full icon sets in four runs — local Canvas work, 2 free batches a day.
Shrink stacks of PDFs 40–90% with Maximum, Balanced, or High-Quality tiers that recompress images and strip metadata. Firms email 25 filings instead of courier — local pdf-lib work, 2 free batches a day.
Compress multiple videos with one shared CRF setting (18 high quality, 23 default, 28 smaller, 35 maximum) encoded libx264 medium preset with 128k AAC audio. Studios batch 20 daily uploads at CRF 28 — local FFmpeg WASM, 2 free batches a day.
AVIF where supported saves over WebP at equal quality — but outputs here are AVIF-only, so keep WebP fallbacks from the Bulk Image Converter. Serve AVIF with WebP fallback: modern Chrome and Firefox take AVIF, older clients fall back seamlessly.
Web (1920px/q60) smallest, Balanced (2048px/q75) default, High Quality (3000px/q85), Maximum (original width/q95). Only images wider than the cap downscale — narrower files keep native pixels at the chosen quality.
Chrome, Firefox, Edge, and Safari 16+ cover most modern traffic; older browsers need the WebP fallback. Encoding itself needs a browser with AVIF canvas support — unsupported browsers fail per file with an explicit error.
No — conversion runs locally in your browser on Canvas; images never leave your device. Only the final ZIP counts as one Pro download — the whole optimized set in a single save.
Add Text to Photo
Add one custom text caption onto a photo with color, size (10–300px slider), and X/Y position controls, composed on fixed social-size canvases — Instagram Post 1080×1080, Reel 1080×1920, YouTube Banner 2560×1440, Twitter Header 1500×500, or Custom. Exports PNG locally in your browser on Canvas; 3 free downloads a day.
Batch Image Editor
Downscale a batch of images to one max width (default 1920px) with an optional bottom-right watermark, then download everything as a ZIP. Same max-width and watermark apply to every image — local Canvas work, 3 free images a day.
Compress Image to 50KB
Shrinks one photo to under 50 KB (51,200 bytes) for portals with strict limits — NSDL, UIDAI, UPSC, SSC, and banking uploads. Runs up to 5 auto passes locally with the browser-image-compression library; standard metadata is preserved.
HEIC to JPG
Convert HEIC images to JPG format in your browser. Photos never leave your device — processing runs locally in your browser with Canvas and WebAssembly.
Background Remover
Segments the foreground subject from an image using a neural network, producing a transparent PNG with clean edges. Handles hair, fur, and semi-transparent regions better than chroma-key or magic-wand selection. Max 50MB.
WebP to JPG
Convert WEBP images to JPG format in your browser. Photos never leave your device — processing runs locally in your browser with Canvas and WebAssembly.