Simple Image Converter — HEIC, WEBP, AVIF, PNG, JPG, PDF
Avalon Software
Batch-convert images between HEIC, AVIF, WebP, PNG, JPG, TIFF, BMP, ICO, and PDF. Drag in files or folders, pick a format, click Convert. Runs 100% offline which means no uploads, no accounts, no watermarks, no subscription. iPhone HEIC photos open out of the box. Windows and SteamOS.
Overview
Turn a pile of images into exactly the format you need. Drop in files or whole folders, pick a format, click Convert — done. No uploads, no accounts, no watermarks, no subscription.
Every format that matters
Opens: HEIC/HEIF, AVIF, WebP, PNG, JPG/JFIF, BMP, TIFF, GIF, SVG, ICO, PDF
Saves: JPG, PNG, WebP, TIFF, BMP, ICO, PDF
iPhone photos just work
HEIC opens out of the box — no codec packs, no browser extensions, no sketchy websites. Convert a phone's worth of photos to JPG in one go, with orientation handled correctly every time.
Built for big batches
Drop 500 files at once. Conversions run in parallel with live progress, and a problem file never kills the batch — it's skipped with a plain-English reason while everything else finishes.
PDF, both directions
Export PDF pages as images at 150–600 DPI, a page range or the whole document. Or go the other way: combine scans and photos into a single PDF.
Make real icons
Turn any image into a proper multi-resolution Windows ICO (16 to 256 pixels) — ready for apps, shortcuts, and favicons.
Private by design
Everything runs on your machine. The app makes zero network connections — your images never leave your computer. Location data and other metadata (EXIF/GPS) are stripped from output by default, so sharing a converted photo doesn't share where you took it.
Simple on purpose
One window. One-click presets for the common jobs — iPhone photos to JPG, web images to PNG, scans to PDF, email-size copies, icons. Quality, resize, and transparency-background options when you want them, out of the way when you don't.
One-time purchase — no subscription, no file limits, no watermarks
Fast native engine — hundreds of files a minute on a typical PC
Transparent PNG/WebP flattened onto the background color you choose
Handles unusual filenames, deep folders, and mixed-format batches
Runs natively on Windows and Linux — Steam Deck supported
The feel
Genres
Weak PC? It still plays
Play Simple Image Converter — HEIC, WEBP, AVIF, PNG, JPG, PDF on a weak PC
Simple Image Converter — HEIC, WEBP, AVIF, PNG, JPG, PDF needs at least 100 MB of RAM. Cloud PC is a Windows computer with a strong GPU in the cloud. You control it from your laptop, phone or desktop.
Turn on Cloud PC
Log in to Thinkmay and start your machine. You get a Windows desktop of your own.
Install the game
Install Simple Image Converter — HEIC, WEBP, AVIF, PNG, JPG, PDF from Steam as you would at home.
Play on any device
Play on a laptop, phone or desktop. Controllers and microphones work.
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