Convert TIF to APNG Online

TIF or APNG? What Actually Changes in the Conversion

TIF and APNG are both lossless raster formats, so the instinct is that nothing is lost. That is only half right. APNG adds the one thing TIF cannot do — play as an animation in a browser — and drops three things TIF is good at: bit depths above 8 per channel, CMYK, and multiple pages in one file. The short answer: convert to APNG when you have a sequence of separate TIF files that needs to loop on a web page, and keep the TIFs when depth, colour space or archival fidelity is the point.

Side-by-side: TIF vs APNG

When TIF Stays the Right File

• The scan is 16-bit per channel, or CMYK for print. APNG is 8-bit RGB, so both get converted down and the extra data is gone for good.
• The file is a multi-page document — a fax, a book scan, a Z-stack. TIF holds pages natively; there is no such thing as a "page" in an APNG, only frames.
• You are keeping an archival master. TIFF 6.0 has been widely readable since 1992, and lossless TIF is a standard deposit format for digitisation programmes.
• The images are big. A 600 DPI A4 scan is roughly 5,000 × 7,000 pixels; storing thirty of those as APNG frames produces a file no browser will load comfortably.

When APNG Is the Right Target

• You have a numbered sequence of separate TIF files — rendered frames, a stop-motion shoot, a time-lapse, a CAD turntable — and want one file that loops on a web page.
• The frames have soft or anti-aliased transparent edges. APNG's 8-bit alpha keeps every intermediate opacity level, where GIF's 1-bit transparency forces each pixel to fully opaque or fully invisible and leaves a jagged halo.
• The content has gradients, skin tones or subtle colour where GIF's 256-colour palette would band visibly.
• The sequence is short. APNG has no motion prediction between frames, so it earns its place at a few dozen frames, not a few hundred.

How to Convert TIF to APNG

1. Upload Your TIF Files: Drag your .tif/.tiff images onto the page or use the file picker. Add two or more, in the order you want them played — the list order on the page is the frame order.
2. Set the Framerate: In Advanced Options the Framerate dropdown opens on "10 FPS (Recommended)" and runs from "1 FPS (Slideshow)" to "50 FPS (Max Speed)". The value becomes the per-frame delay for every frame; it never adds or removes frames.
3. Choose Image resolution and Combine mode: Image resolution starts on "Keep original" — switch to Preset Resolutions, Width, Height, Width x Height or Resolution Percentage to shrink the result. Under "Combine?", "Single animation" (the default) builds one APNG from the whole upload; "Individual files" converts each upload on its own.
4. Convert and Download: Click Convert and save the file. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours. No sign-up, no watermark.

The Three Controls on This Page

There is no quality slider, no palette-reduction setting and no loop-count control on this conversion. APNG frames are lossless by definition, and the output is always written to loop forever. Frame count, frame dimensions and frame content are the only things that move the file size.

Frequently Asked Questions

Is .tif different from .tiff, and does it matter here?

No and no. They are two spellings of the same format — the three-letter form is a leftover from DOS-era 8.3 filenames — and this page accepts either extension, as does its TIFF to APNG twin. Nothing about the conversion changes based on which spelling your files use.

Why did my multi-page TIF come out as a single static image?

Each uploaded file is normalised to one image before the frames are assembled, and that step reads only the first page (the first IFD) of a multi-page TIF. Pages two onward never reach the assembler, so the result is one frame — and a one-frame APNG is just an ordinary static PNG. Split the document first with Photoshop, GIMP, ImageJ/Fiji or tiffsplit, then upload the individual TIFs together as one batch.

How many files do I need before I get real animation?

Two or more, and they must actually differ. The assembler discards duplicate consecutive frames, so uploading the same image twice still produces a file with no animation control chunk — a plain static PNG. Any set of two or more visibly different TIFs produces a genuine animated PNG that loops indefinitely.

Will 16-bit or CMYK TIFs survive the conversion?

No. APNG stores 8 bits per channel in RGB, so a 16-bit-per-channel scan is reduced to 8 bits and a CMYK TIF is converted to RGB. For photographic content the visible difference is usually small, but the data is genuinely discarded — always convert a copy and keep the TIFs if they are your masters.

Does APNG keep the alpha channel from my TIFs?

Yes, when the TIF has one. APNG carries a full 8-bit alpha channel, so semi-transparent pixels, anti-aliased outlines and soft shadows all come through at their original opacity rather than being flattened onto a background. A TIF saved without alpha simply stays fully opaque — the conversion never invents transparency that was not there.

My TIFs are different sizes. What happens to the frames?

They are unified onto one canvas, because APNG requires every frame to share the same dimensions and the assembler cannot resize. Each smaller frame is scaled with its aspect ratio preserved, centred, and padded out to a canvas as large as the widest and tallest frame in the set; the padding is left transparent. Nothing is cropped or stretched. If every file already shares one size, this step is skipped entirely.

Why is the APNG so much bigger than the sum of my TIFs suggested?

Two reasons. Each frame is stored independently — APNG has no inter-frame motion prediction of the kind H.264 uses — so ten frames cost roughly ten times one frame. And many TIFs on disk are LZW- or JPEG-compressed at high ratios that PNG's lossless DEFLATE cannot match on photographic content. Reducing Image resolution is by far the most effective fix, since bytes track pixel count per frame; for a long sequence, TIF to MP4 will be smaller by an order of magnitude.

What happens in software that cannot animate a PNG?

It shows the first frame as an ordinary still image. The PNG Third Edition specification requires a decoder that does not recognise the acTL, fcTL and fdAT chunks to ignore them and display the static image, so an APNG degrades gracefully in old viewers, thumbnailers and image libraries instead of failing. If you need guaranteed inline animation in chat apps, forums and HTML email, TIF to GIF is the safer target despite its 256-colour ceiling.