Convert 7Z to ZIP

Turn 7Z, the 7-Zip archive format with high-ratio LZMA compression, into ZIP, the universal archive format every operating system opens. FileChanger runs the archive conversion in one call, no local tooling to install.

In the browser

Upload a file and download the result, no pipeline required. Open the converter.

One API call

POST the file with from=7z and to=zip, get the converted bytes back. Jump to the code.

From an agent

FileChanger ships an MCP server, so agents can run this conversion themselves. See the docs for setup.

Uploading something you care about? How to convert files safely explains what to check before you trust any converter, and Security and data handling describes exactly what we store and for how long.

Convert 7Z to ZIP in code

The same call from any language: POST the file to /api/convert, the response body is the converted file.

curl -X POST https://filechanger.io/api/convert \
  -H "X-Api-Key: fc_your_api_key_here" \
  -F "file=@input.7z" \
  -F "from=7z" \
  -F "to=zip" \
  -o output.zip

import requests

with open("input.7z", "rb") as f:
    response = requests.post(
        "https://filechanger.io/api/convert",
        headers={"X-Api-Key": "fc_your_api_key_here"},
        files={"file": f},
        data={"from": "7z", "to": "zip"},
    )

response.raise_for_status()
with open("output.zip", "wb") as out:
    out.write(response.content)

const formData = new FormData();
formData.append("file", fileInput.files[0]);
formData.append("from", "7z");
formData.append("to", "zip");

const response = await fetch("https://filechanger.io/api/convert", {
  method: "POST",
  headers: { "X-Api-Key": "fc_your_api_key_here" },
  body: formData,
});

const output = await response.blob();

import java.net.http.HttpRequest.BodyPublishers;
import java.net.http.HttpResponse.BodyHandlers;
import java.nio.file.Path;

String boundary = "----FormBoundary" + System.currentTimeMillis();
byte[] fileBytes = java.nio.file.Files.readAllBytes(Path.of("input.7z"));

String body = "--" + boundary + "\r\n"
    + "Content-Disposition: form-data; name=\"file\"; filename=\"input.7z\"\r\n"
    + "Content-Type: application/octet-stream\r\n\r\n"
    + new String(fileBytes) + "\r\n"
    + "--" + boundary + "\r\nContent-Disposition: form-data; name=\"from\"\r\n\r\n7z\r\n"
    + "--" + boundary + "\r\nContent-Disposition: form-data; name=\"to\"\r\n\r\nzip\r\n"
    + "--" + boundary + "--";

HttpClient client = HttpClient.newHttpClient();
HttpRequest request = HttpRequest.newBuilder()
    .uri(URI.create("https://filechanger.io/api/convert"))
    .header("X-Api-Key", "fc_your_api_key_here")
    .header("Content-Type", "multipart/form-data; boundary=" + boundary)
    .POST(BodyPublishers.ofString(body))
    .build();

HttpResponse<byte[]> response = client.send(
    request, BodyHandlers.ofByteArray());
java.nio.file.Files.write(Path.of("output.zip"), response.body());

import Network.HTTP.Client
import Network.HTTP.Client.MultipartFormData
import qualified Data.ByteString.Lazy as BL

main :: IO ()
main = do
  manager <- newManager defaultManagerSettings
  initialReq <- parseRequest "POST https://filechanger.io/api/convert"
  let req = initialReq
        { requestHeaders = [("X-Api-Key", "fc_your_api_key_here")] }
  request <- formDataBody
    [ partFileSource "file" "input.7z"
    , partBS "from" "7z"
    , partBS "to" "zip"
    ] req

  response <- httpLbs request manager
  BL.writeFile "output.zip" (responseBody response)

About ZIP

ZIP is the universal data compression and archive file format supported natively by all major operating systems. It aggregates one or more files and directories into a single compressed container using DEFLATE compression, making it the standard format for file distribution and backups.

Frequently asked questions

How do I convert 7Z to ZIP?

Upload your file in the browser converter and pick ZIP as the target, or POST it to /api/convert with from=7z and to=zip. The response body is the converted file.

Is converting 7Z to ZIP free?

Yes. Every account gets 200 MB of conversions free, metered on input size. After that you pay only for what you convert, from $0.10 per GB, with no monthly fee. See pricing for the paid tiers.

Is there an API for 7Z to ZIP conversion?

Yes, this whole conversion is one POST to /api/convert (the code examples above show it in five languages), plus an MCP server so AI agents can run it directly.

Why convert 7Z to ZIP?

While 7Z achieves high compression ratios, opening .7z archives requires third-party software on many systems. Converting 7Z to ZIP makes the archive immediately accessible on standard Windows, macOS, iOS, and Android devices without extra tools.

Can I extract files without third-party software after converting to ZIP?

Yes. Windows Explorer, macOS Finder, and Linux desktop environments include native ZIP extraction without needing 7-Zip or WinRAR installed.

Is archive compression preserved during conversion?

Yes. Files are unpacked and repacked using standard ZIP DEFLATE compression to maintain a compact file size.