Convert TIFF to PNG — Free TIFF to PNG Converter
Free TIFF to PNG conversion, batches included — everything runs on your device.
Lossless in, lossless out, with one honest limit. PNG can store 16 bits per channel, and this conversion cannot give you that, because the browser's canvas hands us 8 bits regardless of what the TIFF contained. Alpha survives. For a scanned document or an 8-bit image you get a faithful copy in a format that browsers actually display, which is the thing TIFF never managed.
How to Convert TIFF to PNG
Select your TIFF files
Drop images in — every common format works.
Convert to PNG
Runs automatically; open advanced settings to tune quality.
Download
Save files singly or as one ZIP.
Why Convert TIFF to PNG?
When you need to convert a TIFF file while preserving every pixel of detail, PNG is the right target. PNG uses lossless compression that keeps your image quality intact while reducing file size compared to uncompressed TIFF. This is ideal for scanned documents, medical images, and professional graphics that need exact pixel reproduction.
PNG also supports transparency, which TIFF may include. Your transparent areas will be preserved in the converted file. PNG works in every browser, every editor, and every operating system — far wider compatibility than TIFF.
The conversion happens on your computer, not ours. LeanImg has no server-side pipeline — which, for scans of contracts or records, is the whole point. It costs nothing and finishes in moments.
If file size matters more than pixel-perfect quality, consider TIFF to JPG for much smaller files. The compressor squeezes further savings out of the PNG afterward, still losslessly.
What changes going from TIFF to PNG
This direction keeps the pixels but not the container. LeanImg decodes only the first image directory, so a multi-page scan hands over page one and nothing else. Whatever compression the TIFF used is unpacked and replaced by PNG's deflate; an uncompressed or LZW file typically comes out smaller, while a TIFF whose strips were JPEG-compressed comes out larger, because a lossless PNG has to spell out every artefact the JPEG stage introduced and none of that damage is undone.
Alpha comes through as a straight copy of the extra sample. The converter does not read the tag that says whether that alpha is premultiplied, so an associated-alpha TIFF from a compositing tool can show dark fringes once the PNG is read as unassociated. 16-bit samples are cut to their high byte, and CMYK is converted by a fixed formula rather than by the file's profile. Nothing else in the tag structure survives: no ICC profile, no EXIF, no resolution, no GeoTIFF georeferencing, and the PNG is written without a pHYs, iCCP or text chunk of its own.
Because both ends are lossless, this is the safe route for an 8-bit scan or a screenshot that was saved as TIFF, and it is the route that finally lets Chrome, Firefox and Edge display the image instead of offering a download. Don't use it when the TIFF exists for print: PNG has no CMYK mode, and the conversion throws away the profile and the dpi that a print workflow relies on.
TIFF vs PNG
| Feature | TIFF | PNG |
|---|---|---|
| File Size | Very large | Large (but smaller) |
| Transparency | Yes | Yes |
| Compression | Lossless or none | Lossless |
| Software Support | Professional tools | Universal |
| Best For | Print, archival | Web, editing |
| Quality | Exact pixels | Exact pixels |
What is a PNG file?
PNG became a W3C Recommendation in October 1996, designed after Unisys began enforcing the LZW patent that GIF relied on. It is lossless and only lossless: one compression method, deflate, applied after per-scanline filters. Every tool advertising a lossy PNG is really quantizing to a 256 color palette before writing an ordinary lossless PNG. Transparency comes in three grades: a real alpha channel at 8 or 16 bits, up to 256 alpha levels from a palette table, or a single keyed color.
| Released | 1996, W3C Recommendation. ISO/IEC 15948 since 2004 |
| Compression | Lossless only, deflate with per-scanline filters |
| Transparency | 8 or 16 bit alpha channel, a palette table or one keyed color |
| Animation | APNG, official only since the Third Edition in June 2025 |
| Color depth | Up to 16 bits per channel. Browser canvas APIs truncate that to 8 |
| MIME type | image/png |
How to open a PNG file
Nothing needs installing anywhere: Preview and Quick Look on macOS, Photos and Paint on Windows, and libpng as a base dependency on Linux mean GIMP, Krita and every GTK or Qt application read it. The interesting tools are the optimizers — optipng, oxipng and zopflipng rewrite the file losslessly, and LeanImg's compressor runs oxipng at optimization level 3 without ever changing a pixel.
Convert other formats to PNG
Convert TIFF to other formats
Frequently Asked Questions
How to convert TIFF to PNG?
Bring your TIFF files to LeanImg and collect PNGs seconds later — the decoding runs inside the browser itself. Batches are fine, registration is not a thing, and the service is free.
Is it safe to convert TIFF to PNG online?
It is safe even for sensitive material. Because the conversion is local, a contract or medical scan you convert here is never exposed to a network at all.
How to convert TIFF to PNG on Mac?
On a Mac, load the page in any browser and feed it your TIFF files; the PNG copies arrive in seconds. There is no app to add and no account to make.