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Developer & Web Utilities

HAR Viewer.

Inspect sanitized HAR request, timing and size facts locally without replaying traffic. Data stays in this browser. Inspect sanitized HAR request, timing and size facts locally without replaying traffic.

Use HAR Viewer

Private in this browser. Source, parser values and output stay in this browser.

No file selected.
Tool options

Options appear after the file is inspected locally.

Preparing the local tool…

How it works

  1. 01

    Paste or choose a source.

  2. 02

    Review explicit options and limits.

  3. 03

    Download the independently verified result.

Frequently asked questions

Does the tool execute or request analyzed content?

No. The parser runs locally in a bounded worker and treats content only as data.

Does HAR Viewer upload my data?

HAR Viewer runs locally in your browser. Source, parser values and output stay in this browser.

What output does HAR Viewer create?

HAR Viewer creates Json output after the result passes its local verification checks.

JSON FormatterFormat, minify and sort bounded JSON without uploading it.YAML / JSON ConverterConvert data-only YAML and JSON locally with aliases and custom tags disabled.Regular Expression TesterTest a bounded regular expression in a disposable worker with match and capture positions.
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