Bun 1.3.14

Oven announced the release of Bun v1.3.14 on May 13, 2026, a feature and maintenance update that ships 92 issue fixes addressing 380 reported problems. The release introduces several notable capabilities while continuing the runtime's rapid development cadence.

Bun.Image: Built-in Image Processing

The flagship feature in this release is Bun.Image, a native image processing API that provides a chainable pipeline for decoding, transforming, and encoding images. Designed as a drop-in alternative to the popular sharp library for common operations, it supports formats including JPEG, PNG, WebP, and AVIF. Early benchmarks show competitive performance with native CLI tools.

Global Virtual Store Accelerates Installs

The isolated linker in bun install now supports a global virtual store, yielding up to 7x faster warm installs. For CI pipelines and monorepo workflows where the same dependencies are installed repeatedly across projects, this represents a significant time saving in day-to-day development.

HTTP/3 (QUIC) Support Arrives

Bun v1.3.14 adds experimental HTTP/3 (QUIC) support to Bun.serve(). When http3: true is set alongside TLS configuration, Bun binds both TCP for HTTP/1.1 and HTTP/2, and UDP for HTTP/3 on the same port. The implementation is marked as highly experimental and not yet recommended for production traffic.

Smaller Binaries

Binary size has been reduced by 17 MB on Windows and 7 MB on Linux, making Bun easier to deploy in containerized and resource-constrained environments. The reduction comes from linker improvements and dead code elimination in the JavaScriptCore engine integration.

What Is Next

Bun creator Jarred Sumner has indicated that v1.4 is in active development with a tentative release date of July 7, 2026. The next major release is expected to include further Node.js compatibility improvements and a potential rewrite of core components from Zig to Rust for improved maintainability.