Build Log Viewer

A browser app for reading Azure Pipelines and GitHub Actions log ZIP files.

Drop in a downloaded log archive and browse jobs and tasks on the left while reading formatted logs on the right.

Give it a try: https://chrisblankde.github.io/BuildLogViewer/

What it can do

• Upload log ZIP files by drag-and-drop or file picker
• Supports Azure Pipelines and GitHub Actions log archives
• Show pipeline structure (stage/job/task) in a collapsible tree
• Highlight errors, warnings, timestamps, and success messages
• Collapse/expand grouped blocks (##[group] / ##[endgroup])
• Search inside the active log with next/previous match navigation
• Toggle timestamp visibility and line wrapping
• Show simple task status indicators (error/warning/success)

Privacy

All parsing happens client-side. No backend. No uploads.

Known limitations

• Very large ZIPs/logs can be slow in the browser
• .txt logs are expected
• Structured JSON logs are shown as plain text
• GitHub Actions ZIPs downloaded via the GitHub UI are supported; API-only artifacts may vary

Contributing

Issues and PRs are welcome.