Safely Convert ANSI Terminal Logs to HTML

For developers and DevOps engineers who need to embed terminal or build logs in web pages without XSS risks. Paste ANSI output, get sanitized HTML that preserves colors and formatting while neutralizing malicious scripts.

Results update live as you type — no button needed. The Example button fills a sample input.

Why use ANSI to HTML Sanitizer?

Neutralizes XSS payloads like <script> tags and event handlers

Preserves ANSI color codes and terminal formatting

Output is ready to embed in build log viewers and dashboards

No data leaves your browser - all processing is client-side

Works with logs from CI/CD, SSH sessions, and command-line tools

FAQ

What is ANSI to HTML conversion?

ANSI escape codes are used in terminal output to add colors and formatting. Converting them to HTML lets you display colored logs in a web browser. Our tool also sanitizes the output to prevent XSS attacks.

Why is sanitization important?

Terminal logs can contain malicious input, such as <script> tags from user data. Without sanitization, embedding raw logs in HTML can lead to XSS vulnerabilities, as seen in the ansi2html incident affecting Sourcehut. Our tool escapes dangerous characters.

Does this tool preserve colors?

Yes, the sanitization process escapes HTML but leaves ANSI escape sequences intact. You can then use a safe ANSI-to-HTML renderer that handles colors without executing scripts.

Is my data sent to a server?

No, all processing happens in your browser. Your logs never leave your device.

Example input

Try it with this sample — paste it into the box above:

\u001b[31mERROR\u001b[0m: <script>alert('xss')</script> failed at line 42

How to use ANSI to HTML Sanitizer

  1. Enter or paste your data into the Paste ANSI terminal output box above.
  2. The result appears instantly in the Sanitized HTML box — everything runs in your browser, nothing is uploaded.
  3. Use Copy or Download to keep the result, or Example to load a sample first.

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