---
title: Easier debugging in Workers with improved Wrangler error screen · Changelog
description: Wrangler's error screen now features light and dark themes, more
  reliable source map resolution, and better error cause display.
chatbotDeprioritize: true
source_url:
  html: https://developers.cloudflare.com/changelog/2025-08-19-improved-wrangler-error-screen/
  md: https://developers.cloudflare.com/changelog/2025-08-19-improved-wrangler-error-screen/index.md
---

# Changelog

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## Easier debugging in Workers with improved Wrangler error screen

Aug 19, 2025

[Workers](https://developers.cloudflare.com/workers/)

Wrangler's error screen has received several improvements to enhance your debugging experience!

The error screen now features a refreshed design thanks to [youch](https://www.npmjs.com/package/youch), with support for both light and dark themes, improved source map resolution logic that handles missing source files more reliably, and better error cause display.

| Before | After (Light) | After (Dark) |
| - | - | - |
| ![Old error screen](https://developers.cloudflare.com/_astro/old-error-screen.yurLWiKb_1hdYs1.webp) | ![New light theme error screen](https://developers.cloudflare.com/_astro/new-error-screen-light.CcroERTP_QJ0bd.webp) | ![New dark theme error screen](https://developers.cloudflare.com/_astro/new-error-screen-dark.BIDA2RGg_Z2sP2om.webp) |

Try it out now with `npx wrangler@latest dev` in your Workers project.
