AVIF to TCR Converter

Turn AVIF into TCR format online — free and easy

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Quality Preserved

Convertio maintains maximum visual fidelity when transforming AVIF to TCR — your images retain their clarity through the conversion process.

Cloud Processing

AVIF to TCR conversion runs entirely on Convertio servers — your device stays fast and responsive while the heavy lifting happens in the cloud.

Data Safety First

Convertio deletes your AVIF uploads instantly after processing and removes TCR output within 24 hours — no files linger on servers.

How to convert AVIF to TCR

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose tcr or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your tcr file right afterwards

About formats

AVIF (AV1 Image File Format) is a modern image format derived from the AV1 video codec, developed by the Alliance for Open Media and specified in February 2019. The format leverages the intra-frame coding tools of AV1 — a royalty-free video codec backed by Google, Apple, Microsoft, Amazon, Netflix, and other major technology companies — to compress still images with substantially higher efficiency than JPEG, PNG, or even WebP. AVIF stores images in the HEIF (High Efficiency Image File Format) container, supporting both lossy and lossless compression, HDR (high dynamic range) with wide color gamuts up to 12-bit depth, alpha transparency, and animated sequences. At equivalent visual quality, AVIF files are typically 30-50% smaller than WebP and 50-70% smaller than JPEG, representing the largest compression improvement in mainstream image formats in over a decade. One advantage is exceptional compression efficiency — AVIF delivers visually indistinguishable images at dramatically lower file sizes, directly reducing bandwidth consumption and improving page load times for web content. The royalty-free licensing model provides another key strength: unlike HEIC/HEIF which relies on patent-encumbered HEVC, AVIF's AV1 foundation is free for anyone to implement without licensing fees. Browser support has reached broad adoption, with Chrome, Firefox, Safari, and Edge all rendering AVIF natively. The format is rapidly gaining adoption for web images where quality-to-size ratio is paramount.
Initial release: February 8, 2019
TCR (Text Compression for Reader) is a compressed plain-text ebook format developed by Barry Childress in the early 1990s for the Psion Series 3 family of palmtop computers. The format was created for Childress's Reader3 application, a text file viewer that needed to fit large books into the Psion's extremely limited storage — typically 128 KB to 2 MB of available memory. TCR uses a dictionary-based compression scheme derived from the earlier ZVR format by Ian Giddings, replacing repeated byte sequences with single-byte tokens that reference a header dictionary. This straightforward approach achieves compression ratios of roughly 40-60% on typical English prose while requiring minimal CPU resources for decompression. The Psion Series 3 ran on a 3.84 MHz NEC V30 processor with no floating-point unit, so TCR's low computational overhead was essential for smooth page-by-page reading. A key advantage is remarkable storage efficiency for its simplicity — users could carry dozens of novels on removable SSD cards that held only a few hundred kilobytes. The format found a dedicated user community among Psion enthusiasts who built libraries of compressed literature for portable reading years before smartphones existed. Though the Psion platform faded from the market in the early 2000s, TCR files can still be opened and converted by modern ebook tools, and the format stands as an early example of purpose-built mobile reading technology from the pre-smartphone era.
Developer: Barry Childress
Initial release: 1993

Frequently Asked Questions

Why convert AVIF to TCR?

TCR compresses your content for Psion eBook readers — a niche format useful when distributing text to legacy Psion handheld devices.

How do I open TCR files?

You can open TCR files with Calibre, Psion devices, CoolReader. Free alternatives are available for every platform.

Are my files safe during conversion?

Convertio uses encrypted connections for all transfers. Your AVIF uploads are deleted immediately after conversion, and TCR downloads are removed within 24 hours.

Can I convert AVIF to TCR for free?

Yes — Convertio offers free AVIF to TCR conversion. For professional volumes and larger files, premium plans provide expanded limits and priority processing.

Will my AVIF image look the same as TCR?

The visual appearance is preserved as closely as the TCR format allows. Any differences are typically imperceptible to the human eye in normal viewing.

Is the conversion process fast?

AVIF to TCR conversion usually finishes in a few seconds. Larger files may take slightly longer, but the cloud-based processing keeps things efficient.