TCR to G4 conversion is the process of transforming an ebook file in the TCR (Psion/Windoz compressed ebook) format into the G4 (Mobipocket/PRC G4-encoded) ebook format. This conversion repackages text and images, adapts metadata and encoding, and optionally reflows or compresses content so the book can be read on G4-compatible readers and apps.
Related guides
Practical guides to help you choose formats, preserve quality, and avoid common conversion problems.
Getting EPUB files onto your Kindle used to require mandatory conversion, but Amazon has gradually added native EPUB support through Send to Kindle. This guide covers every method for reading any eBook on your Kindle, from one-click email transfers to advanced Calibre workflows, plus metadata preservation, DRM considerations, and format selection between MOBI, AZW3, and KFX.
Read guide →A comprehensive guide to EPUB, MOBI, AZW, and PDF eBook formats. Compare features, device compatibility, DRM, file sizes, and learn which format is best for your reading device in 2026.
Read guide →Drag your .TCR file from your computer or use the browse function.
Confirm .g4 as the selected destination format.
Click "Convert" and download your converted .G4 file once ready.
TCR files usually carry the MIME type image/tcr and are often used for scanned documents using early compression codecs. G4 files use the MIME type image/g4 and employ Group 4 fax compression, which is optimized for black-and-white images and fax transmissions. Both formats are primarily used for document imaging and archival.
The G4 (.G4) format is commonly used for ebook. Understanding its characteristics can be helpful when converting to or from other formats like TCR.
While specific technical details aren't available here, G4 files generally serve the purpose of storing ebook effectively within their domain.
Convert your TCR files to G4 format effortlessly using our online converter. Designed for quick, reliable conversions, this tool supports smooth transitions between these two formats, making file management simpler than ever.
TCR files typically support older compression methods resulting in larger sizes, while G4 uses more advanced compression that produces smaller, higher-quality files. G4 format is more widely supported across modern platforms compared to TCR, which is less common and often limited to legacy systems.
Keep individual TCR files under 25–50MB for fastest, most reliable conversion; larger files increase memory and processing time.
To preserve quality, choose lossless image preservation or low compression for G4; reflowing text helps readability on small devices but may alter layout.
For batch conversion, process files in groups of 10–20 to avoid timeouts and monitor output for encoding errors; use consistent encoding (prefer UTF-8) before converting.
Limitations: TCR is an older format and may contain legacy character encodings or proprietary markup that requires manual cleanup; complex layout, interactive elements, or DRM cannot always be converted perfectly.
This TCR to G4 converter saved me hours in file conversion.
James L.
Archivist
The image quality after conversion was excellent and perfect for my needs.
Emily R.
Graphic Designer
Fast, reliable, and easy to use — highly recommend this online tool.
Daniel M.
IT Specialist
Start your free TCR to G4 conversion now.
Drag your file here to to upload.
Up to 250MB
If you need exact pagination or specialist typography, convert to an intermediate editable format first (e.g., EPUB) and clean up before exporting to G4.