LOON TOOLLEGACY → NEW

Rewrite Syntax Converter

Paste legacy configuration to migrate actions, URL regexes, and capture references line by line while preserving comments and unrecognized content.

Legacy syntax guide New syntax guide Open Rewrite BuilderAll conversion happens locally in your browser; no configuration is uploaded

Add `[Rewrite]` when the input has no section heading

Unrecognized lines are kept unchanged, with the reason shown below.

INPUT

Legacy configuration

OUTPUT

New configuration

Conversion complete

[Rewrite]
# URL 替换与重定向
request if ${url} ~= /^https:\/\/old\.example\.com\/(.*)$/i as urlMatch then url.replace("https://new.example.com/${urlMatch.1}")
request if ${url} ~= /^http:\/\/example\.com/i then redirect(302, "https://example.com")

# 请求 Header
request if ${url} ~= /^https:\/\/api\.example\.com/i then request.header.add("X-Loon", "true")
request if ${url} ~= /^https:\/\/api\.example\.com/i then request.header.del("Cookie")
request if ${url} ~= /^https:\/\/api\.example\.com/i then request.header.replace("User-Agent", /iPhone\x20OS\x20(\d+)/, "iPhone OS $1")

# JSON 与 Mock
request if ${url} ~= /^https:\/\/api\.example\.com/i then request.json.add("data.enabled", true)
response if ${url} ~= /^https:\/\/api\.example\.com/i then response.json.delete("data.ads")
response if ${url} ~= /^https:\/\/api\.example\.com/i then response.body.mock_file("json", "response_body.json", 200)

8Converted

0Unchanged

0Needs review

CHECK

Conversion notes

No issues to review

The converter migrates syntax only; it does not run Rewrite. Load the result in Loon and check the logs.