TIFF to PNG Converter

How do you convert a TIFF to PNG and check the result?

Select Choose TIFF files or drag & drop, choose a local .tif or .tiff file, and let conversion start automatically. If your browser decodes the image, the result offers a PNG download, pixel dimensions, file sizes, and a before/after preview. Check these before replacing any working copy: a successful image export is not a guarantee that TIFF-specific metadata or additional document pages survived.

For a worked example, take a browser-decodable, single-image TIFF named scan.tif whose decoded bitmap is 2400 × 1800 pixels. This page supplies no resize limit, so its canvas is also 2400 × 1800: 4,320,000 pixels. The output filename becomes scan.png. You can change the single-result filename before clicking Download. The PNG byte count is measured after encoding, so it cannot be calculated from those dimensions alone.

Repeat the check for a second source rather than assuming matching extensions mean matching compatibility. TIFF is a container with varied image encodings; this converter delegates decoding to the browser instead of implementing those encodings itself.

What is TIFF, and why convert it to PNG?

TIFF means Tagged Image File Format. The TIFF 6.0 specification describes a tagged raster format with image directories, allowing image data and descriptive fields to coexist in one file. Scanning and image-editing workflows use that flexibility for image characteristics and document organization. A TIFF extension alone does not tell you its compression, sample depth, color interpretation, or number of images.

PNG is useful when a destination accepts PNG images and you need a rendered copy for sharing, a web page, or a document. PNG uses lossless image compression, but converting formats still requires interpreting the source. Keep the TIFF when its editing information, sample precision, or document structure matters. Browse the image tools for follow-up tasks once you have a usable PNG.

What this conversion carries forward

Source property	PNG conversion behavior
Decoded image dimensions	No resize limit is supplied by this page.
Decoded transparency	No opaque background is added.
Multiple TIFF images or pages	No page selection or extraction is implemented.
TIFF metadata and print settings	No TIFF metadata transfer is implemented.

How does browser-based TIFF conversion work?

The conversion engine calls createImageBitmap() with the file, creates a canvas sized to the decoded image, draws that bitmap, and exports image/png. It uses OffscreenCanvas when available and otherwise a regular canvas. PNG encoding receives no quality parameter. There is no quality slider, TIFF compression selector, resize control, or target-file-size control enabled on this page.

This distinction matters when troubleshooting: the file chooser accepts TIFF filenames, while successful decoding depends on the browser and the particular file. The engine catches decoding or canvas errors and returns an error message. It has no bundled TIFF decoder to fall back to. A TIFF that opens in a specialized desktop application may still fail here. Renaming its extension does not change the encoded image data or add decoding support.

Will transparency, color, and bit depth stay the same?

The PNG conversion does not paint a replacement background before drawing, so alpha transparency exposed by the decoder can remain transparent. Inspect the downloaded file in its destination, particularly around soft edges. The source side of the comparison also depends on the browser displaying that TIFF, so a missing source preview is not a detailed diagnosis of the file's internal structure.

The engine requests a default 2D canvas. It does not select a high precision canvas format, configure a TIFF color-management pipeline, or copy an embedded TIFF profile. Do not read “lossless PNG” as a promise of identical high bit depth samples, CMYK handling, or scientific measurements. Lossless encoding applies to the image rendered for export. Preserve the original when color-managed print work or numerical pixel values are part of the task.

Can you convert multiple files or every page in one TIFF?

Multiple selected files trigger batch mode. The handler keeps the first 50 files and converts them sequentially, recording success or failure for each. Review the count before downloading: Download ZIP includes only successful results, under converted-png.zip. An error in one item does not turn it into a blank PNG in the archive. Split a larger collection into smaller selections.

Batch files and TIFF pages are different units. This tool creates one bitmap per input file and has no image-directory traversal, page counter, or page-range field. It does not export every page of a multi-page TIFF. If a browser returns a usable image, inspect which image it represents. For a complete scanned document, export individual pages in the source application first, then check that your PNG count matches the pages you need.

Why can the PNG be larger, and what limits apply?

There is no fixed TIFF-to-PNG size ratio. Source compression, pixel content, and PNG encoding affect the outcome. Compare the actual source and output sizes shown after conversion instead of planning around a promised percentage reduction. For a smaller sharing copy, consider Image Compressor or PNG to JPG, checking the resulting appearance and transparency requirements.

The chooser advertises up to 100 MB per file, and the batch cap is 50 files. That hint is not a guarantee that a large image will decode: the upload layout does not pass its size setting as a validation limit to the drop zone. Decoding and canvas allocation can fail before export. Reduce the selection or prepare a smaller copy in the source application when a large scan cannot be processed.

What happens to DPI, metadata, and your original file?

The converter creates a new PNG from rendered pixels without copying TIFF tags. Its EXIF transfer path only applies to JPEG-to-JPEG output, and optional PNG postprocessing is not enabled here. Do not depend on it to retain source DPI, camera information, location data, or print instructions. Pixel dimensions and intended physical print size are different properties; check the destination application's print settings separately.

Local file conversion makes no upload request and does not rewrite your original TIFF. The separate Image URL option attempts a network fetch of the address you enter; it can fail, in which case downloading the source and choosing the local file is the suggested fallback. Keep the original master, review the downloaded PNG, and use Convert another or Convert new batch when ready for another selection.