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About

Try on the web. Live on Mac.

Alchemy Web is a lightweight taste of the product — common image, PDF, and video jobs in the browser. The Mac app is the full experience: richer formats, look tools, vectors, offline processing, and AI asks.

Try the web converterDownload Mac app

How it works

  1. 01

    Upload

    Drop a few files to try common conversions in the browser.

  2. 02

    Suggest

    Rule-based picks for formats and jobs that usually make sense.

  3. 03

    Tune & run

    Adjust quality or size when available, then download the result.

  4. 04

    Go deeper on Mac

    Install the desktop app for the full catalog, offline, and AI asks.

Sessions and uploads expire automatically (default 4 hours). Nothing is meant to live on the server permanently.

What you can try on the web

Images

  • Convert — JPEG, PNG, WebP, TIFF, AVIF
  • Resize by max edge
  • Recompress / optimize quality
  • Strip metadata
  • HEIC → JPEG
  • Images → multi-page PDF

PDF

  • Combine files into one PDF
  • Split into one PDF per page
  • Compress PDF
  • PDF → JPEG / PNG / WebP pages

Video & audio

  • Compress video (ffmpeg)
  • Convert to MP4
  • Extract audio (MP3 / M4A)

Data

  • JSON ↔ CSV ↔ YAML (basic)

Web vs Mac — complete list

Capability comparison

Same product family — different surface area.

CapabilityWebMac
JPEG / PNG / WebP / TIFF convert & recompressYesYes
AVIF outputWeb via sharp; Mac focuses on HEIC/JPEG/PNG/WebP/TIFFYesNo
HEIC / HEIF inputYesYes
GIF, BMP, ICO / ICNS, Camera RAW / DNGNoYes
Resize by max edgeYesYes
Crop to aspect / exact pixels (e.g. 600×600)NoYes
Strip EXIF / GPS metadataYesYes
Remove background → transparent PNGNoYes
Look adjusts (grayscale, colorize, hue, blur…)NoYes
Match reference look / ICC color profileNoYes
Images / PDFs → one combined PDFYesYes
Split PDF → one PDF per pageYesYes
Compress PDFYesYes
PDF → image pagesYesYes
SVG / AI / EPS vector render & PDFNoYes
Trace bitmap → SVGNoYes
Video → MP4 / compressYesYes
GIF → MP4NoYes
Extract audio (M4A / MP3…)YesYes
WAV / FLAC / AIFF audio filesNoYes
JSON ↔ CSV ↔ YAMLYesYes
XML / plist round-tripsNoYes
DOCX / Markdown / EPUB / HTML / RTFNoYes
Batch rename (pattern + index)NoYes
Natural-language / LLM suggestionsNoYes
Presets, droplets, Finder drop targetsNoYes
Files stay on your machine (fully offline)NoYes
Try in the browser without installingYesNo

Privacy & storage

Temporary on the web

Web uploads are processed on the hosted server and deleted after the session TTL. Prefer the Mac app when files should never leave your machine.

Get the Mac app