Convert TIFF to PNG

Convert TIFF to PNG online, free and 100% in your browser. No upload, no signup, no size limit — WebAssembly does the work on your device.

How to convert an image

  1. Drop or pick your TIFF file — or paste it with Ctrl/⌘+V.
  2. PNG is already selected — output is lossless, optimized with oxipng.
  3. Convert, compare the before/after, and download — all on your device.

Why convert to this format?

TIFF is a lossless format used in print and scanning workflows — high quality but far too large for the web. PNG is a lossless format with an alpha channel — pixel-perfect for logos, screenshots and line art.

OptImg runs the same Rust codecs desktop tools use, compiled to WebAssembly, so you get desktop-grade PNG output at a sensible default (lossless output) — adjustable at any time — without ever uploading your image.

Everything happens locally: your TIFF is decoded, re-encoded to PNG and handed straight back as a download. No server sees a single byte, which is why there's no queue and no file-size cap.

Frequently asked questions

Is my TIFF uploaded to a server?
No. The TIFF-to-PNG conversion runs entirely in your browser with WebAssembly — your file never leaves your device, there is no queue, and no size limit beyond your device's memory.
Will converting to PNG change the image?
PNG output is lossless, so every pixel the decoder reads is preserved exactly — and the file is optimized with oxipng for the smallest lossless size. A “smaller file” toggle can quantize to a palette when you want extra savings.
Is the TIFF to PNG converter free?
Yes — completely free, with no signup, no watermark and no cap on how many files you convert. There is nothing to install; it runs in your browser.