Playwright Run Diff

Name: Sanestly Playwright Run Diff
Author: Sanestly

open source

See what changed between two test runs.

Try the browser demo View on GitHub All productsNew

run-diff

$ run-diff compare before.zip after.zip

RD-NET-004  POST /api/cart   200 -> 500
RD-TIME-002 checkout.submit  +412ms
RD-CON-001  console          +2 errors

findings: 3   exit code: 1

PlatformOpen SourceMaintained in the open
DistributionGitHubnpm package in preparation
PricingOpen sourceNo hidden fees
StatusNewFollow on GitHub

What it does

A green run and a red run rarely explain themselves. Run Diff takes two Playwright trace archives - a baseline and a candidate - and aligns them action by action, so the regression shows up as a list of findings instead of a guessing session.

Everything runs locally: parsing, matching and pixel diffing happen in a Web Worker in the browser app, or in Node through the CLI. Traces are never uploaded, and exported reports carry sanitized metadata only.

What is inside

Action alignment across two runs: added, removed, reordered and newly failing steps
Per-action timing regressions past absolute and relative thresholds
Network diffs: new or removed requests, status changes, latency deltas
Console diff: new errors, warnings and log-count changes
Pixel-level screencast diffs with configurable ratio and masks
Findings carry versioned rule ids, severity, confidence and investigation hints
Browser app and CLI with JSON, Markdown and self-contained HTML reports
Local-only processing - no upload, no account, CI-friendly exit codes

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