LHA to RAR Converter
Convert LHA to RAR online for free. Fast, secure, and high-quality conversion with no sign-up or software required.
Maximum file size is 1GB
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Upload your file
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What is an LHA file?
The LHA format (originally known as LHarc) is a lossless compressed archive container developed by Haruyasu Yoshizaki in 1988. It implements the Lempel-Ziv-Huffman (LZH) algorithm, a hybrid compression method combining LZ77 sliding-window dictionary compression with static Huffman coding for entropy encoding. Historically significant on Amiga and MS-DOS platforms and remaining a standard in Japanese software distribution, the format utilizes a header structure containing file attributes, timestamps, and a 16-bit Cyclic Redundancy Check (CRC-16) to verify data integrity across compressed volumes.
How to open an LHA file
Native support for the LHA architecture is generally absent in modern operating system kernels such as Windows 10/11 or macOS Ventura. To access the contents, users must employ third-party extraction utilities capable of parsing the LZH algorithm. 7-Zip is the recommended solution for Windows environments; macOS users should utilize The Unarchiver for extraction. On Linux distributions, the lha or lzh command-line utilities can be installed via package managers like APT or RPM to handle decompression.
LHA Technical Info
- Full Name
- LHA Compressed Archive
- Developed By
- Haruyasu Yoshizaki
- Initial Release
- 1988
- MIME Type
- application/x-lzh-compressed
What is a RAR file?
RAR (Roshal Archive) is a proprietary archive file format developed by Eugene Roshal that supports data compression, error recovery, and file spanning. It utilizes a variation of the LZSS algorithm with a sliding window size of up to 4 MB (in RAR4) or 1 GB (in RAR5), combined with Huffman coding. Key technical features include support for AES-256 encryption, BLAKE2sp hash algorithms for file integrity, and specialized recovery records that allow for the reconstruction of damaged data. The format structure supports solid archiving, where multiple files are treated as a single continuous data stream to improve compression ratios.
How to open a RAR file
Due to the proprietary nature of the RAR licensing, creating RAR files requires licensed software (WinRAR), though extraction is supported by various free tools. Windows users typically use WinRAR or 7-Zip to extract contents. macOS users can utilize The Unarchiver or Keka. On Linux, the non-free unrar package or the open-source 7z (p7zip-full) package provides extraction capabilities via the command line.
RAR Technical Info
- Full Name
- Roshal Archive
- Developed By
- Eugene Roshal
- Initial Release
- 1993
- MIME Type
- application/vnd.rar
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Developer API
Convert LHA to RAR via API
Automate LHA to RAR conversions in three steps: create a job, upload your file, then poll for the result.
# 1. Create job
curl -X POST https://api.runconvert.com/v3/jobs \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"tag": "lha-to-rar",
"tasks": {
"upload-file": {
"operation": "import/upload"
},
"convert": {
"operation": "convert",
"input": "upload-file",
"output_format": "rar"
},
"export-result": {
"operation": "export/url",
"input": "convert"
}
}
}'
# 2. Upload your file (use upload_url from the response)
curl -X PUT "$UPLOAD_URL" --upload-file input.lha
# 3. Poll for result
curl https://api.runconvert.com/v3/jobs/$JOB_ID?include=tasks \
-H "Authorization: Bearer YOUR_API_KEY"Replace YOUR_API_KEY with your RunConvert API key. Get your free API key at runconvert.com/api.