ACE to 7Z Converter

Convert ACE to 7Z online for free. Fast, secure, and high-quality conversion with no sign-up or software required.

Free to useNo file stored beyond 1 hourEncrypted over TLS 1.2/1.3No watermarks

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Maximum file size is 1GB

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How it works

Three steps to your converted file

Everything happens in your browser tab - upload, pick a format, download. The heavy lifting runs on our servers.

Upload your file

Drag and drop, click to browse, or paste a URL. Batches take up to 20 files at once - 230+ input formats across video, audio, image, document, and archive types.

Choose an output format

Pick from over a hundred output formats. Filter by category or search by name - every option is open to everyone, no account needed.

Convert & download

Hit Convert and grab your download link moments later. Originals are erased when the job completes; results are cleared within about an hour.

What is an ACE file?

The ACE file extension denotes a proprietary data compression archive format originally developed by Marcel Lemke of e-merge GmbH for the WinAce software. Utilizing a compression algorithm derived from LZ77 dictionary coding and Huffman encoding, the format historically offered higher compression ratios than the standard ZIP Deflate algorithm. ACE archives support robust features including 4096-bit Blowfish encryption, multi-volume spanning, and integrity verification via CRC32 checksums, though the format is now considered legacy following the discovery of the critical CVE-2018-20250 path traversal vulnerability in the widely used unacev2.dll library.

How to open an ACE file

Operating systems do not provide native support for ACE archives; users must utilize third-party file compression software for extraction. While the original WinAce utility is discontinued, specific multi-format archivers such as PeaZip or BitZipper maintain backward compatibility for decompression. Notably, major utilities like WinRAR and 7-Zip have deprecated or excluded native ACE support to mitigate security risks associated with the format's legacy dynamic link libraries.

ACE Technical Info

Full Name: ACE Archive
Developed By: Marcel Lemke (e-merge GmbH)
Initial Release: 1999
MIME Type: application/x-ace-compressed

What is a 7z file?

The 7z format is a compressed archive container created by Igor Pavlov in 1999, characterized by an open architecture and high compression ratios utilizing the LZMA and LZMA2 algorithms. It supports file sizes up to 16 exbibytes (2^64 bytes), Unicode file names, and strong AES-256 encryption, with solid compression capabilities to enhance efficiency for similar file sets. Distributed under the GNU LGPL, the format's modular design accommodates various pre-processing filters and encryption methods, establishing it as a primary standard for high-efficiency data archival.

How to open a 7z file

While Windows 11 builds utilizing the libarchive project offer native support, earlier Windows versions require the official open-source 7-Zip utility or alternatives like WinRAR and PeaZip for extraction. macOS users typically rely on third-party software such as The Unarchiver or Keka, whereas Linux distributions handle 7z archives via the p7zip package accessed through the command line or GUI managers like File Roller.

7z Technical Info

Full Name: 7z Archive Format
Developed By: Igor Pavlov
Initial Release: 1999
MIME Type: application/x-7z-compressed

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Convert ACE to 7Z in seconds

Every ACE to 7Z conversion runs on our servers, so your device stays fast and the output quality stays intact.

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No queue, no waiting. Files are processed on high-performance servers and returned in seconds, even for large files.

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Developer API

Convert ACE to 7Z via API

Automate ACE to 7Z 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": "ace-to-7z",
    "tasks": {
      "upload-file": {
        "operation": "import/upload"
      },
      "convert": {
        "operation": "convert",
        "input": "upload-file",
        "output_format": "7z"
      },
      "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.ace

# 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.