Bun Blog company blog

Bun 1.4

by Jarred Sumner bun.com published 2026-08-20

Bun 1.4 rewrites Bun in Rust, ships built-in headless browser automation (Bun.WebView), Bun.Image, Bun.markdown, JSON5, JSONL, Terminal and cron APIs, Node.js 26.3.0 compatibility with 1,517 newly passing tests, parallel test and run, Windows ARM64, and an opt-in global virtual store for up to 7× faster installs.

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Software EngineeringInfrastructure & DevOps2026

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