Dynapik offers a free online tool to change image types - no need to download anything. It's quick and easy to use. You can change your AVIF images to PTIF format. This tool works for both professionals and casual users. Convert your images to PTIF in seconds.
AVIF (AV1 Image File Format)
The royalty-free successor to WebP, offering the world's best compression for the web.
AVIF is the cutting-edge image format derived from the AV1 video codec. Developed by the Alliance for Open Media (AOMedia)—a consortium including Google, Netflix, Amazon, and Microsoft—it was designed to be the ultimate royalty-free format for the web. AVIF offers significantly better compression than WebP, which was already better than JPEG. It supports features that WebP lacks, such as 10-bit and 12-bit color depth for HDR (High Dynamic Range) images, and it produces fewer compression artifacts at low bitrates. While encoding AVIF files takes longer than other formats, the bandwidth savings are substantial, often reducing file sizes by 50% compared to JPEG.
AVIF uses the HEIF (High Efficiency Image File Format) container structure but encodes the image data using the AV1 video codec. This allows it to use advanced video compression techniques like intra-frame prediction to squeeze image data down to incredibly small sizes. Unlike WebP, which is limited to 8-bit color, AVIF supports 10-bit and 12-bit color depths, making it the first viable web format for HDR photography. It also supports 4:2:0, 4:2:2, and 4:4:4 chroma subsampling, allowing for sharp text and graphics even with lossy compression.
The AV1 video codec was released in 2018 as a royalty-free alternative to HEVC (H.265). The AVIF image format specification followed in 2019. Adoption was rapid compared to previous formats. Chrome added support in 2020, followed by Firefox in 2021. Apple added support in iOS 16 and macOS Ventura (2022), completing the 'universal support' puzzle much faster than WebP did.
Pyramid TIFF
A multi-resolution TIFF optimized for deep zooming.
PTIF (Pyramid TIFF or Pyramidal TIFF) is a standard TIFF file that has been structured to contain multiple resolution levels of the same image (a 'pyramid'). This allows software to open immense images (e.g., gigapixel maps or medical scans) almost instantly by loading only the low-resolution tile suitable for the current zoom level, rather than decoding the entire massive file.
Inside the TIFF wrapper, the image is stored as a series of SubIFDs (Image File Directories). The main image is typically the highest resolution. Subsequent directories contain the image downscaled by powers of two (50%, 25%, 12.5%, etc.). Additionally, the image data is usually 'tiled' (broken into usually 256x256 blocks) rather than 'stripped'. This enables random access to specific regions.
Developed to handle the exploding size of satellite imagery and digital pathology slides.
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