# @opentelemetry/propagator-jaeger

> OpenTelemetry Jaeger propagator provides HTTP header propagation for systems that are using Jaeger HTTP header format.

Latest version **2.11.0** (published 2026-08-31) · Apache-2.0 license · 0 weekly downloads

## Install

```sh
npm install @opentelemetry/propagator-jaeger
pnpm add @opentelemetry/propagator-jaeger
yarn add @opentelemetry/propagator-jaeger
bun add @opentelemetry/propagator-jaeger
```

## Health

**Score 75/100 (B)** — status: active.

Positive: has types; esm support; no vulnerabilities; has provenance; recently updated; high maintenance score; high quality score.

Warnings: low downloads.

## Facts

| | |
|---|---|
| Version | 2.11.0 |
| Published | 2026-08-31 |
| First published | 2020-01-22 |
| Weekly downloads | 0 |
| License | Apache-2.0 |
| TypeScript types | bundled |
| Module format | ESM + CommonJS |
| Node | ^18.19.0 \|\| >=20.6.0 |
| Dependencies | 1 |
| Unpacked size | 68.5 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| Provenance | attested (GitHub Actions) |
| GitHub stars | 3463 |
| Author | OpenTelemetry Authors |
| Maintainers | dyladan, pichlermarc, overbalance, npmjs-account, trentm, martinkuba |
| Keywords | opentelemetry, nodejs, tracing, profiling, jaeger |

## Links

- npm: https://www.npmjs.com/package/@opentelemetry/propagator-jaeger
- Repository: https://github.com/open-telemetry/opentelemetry-js
- Homepage: https://github.com/open-telemetry/opentelemetry-js/tree/main/packages/opentelemetry-propagator-jaeger
- Issues: https://github.com/open-telemetry/opentelemetry-js/issues
- npm.io page: https://npm.io/package/@opentelemetry/propagator-jaeger

## Dependencies (1)

- [@opentelemetry/core](https://npm.io/package/@opentelemetry/core.md) 2.11.0

## Recent versions

- 2.11.0 (latest) — 2026-08-31
- 2.11.0-development.0 (canary) — 2026-08-31
- 1.8.0 (next) — 2022-11-09
- 2.10.0 — 2026-07-21
- 2.9.0 — 2026-07-02
- 2.8.0 — 2026-06-11
- 2.7.1 — 2026-04-29
- 2.7.0 — 2026-04-17
- 2.6.1 — 2026-03-25
- 2.6.0 — 2026-03-03
- 2.5.1 — 2026-02-12
- 2.5.0 — 2026-01-21
- 2.4.0 — 2026-01-14
- 2.3.0 — 2026-01-08
- 2.2.0 — 2025-10-21
- … 144 more at https://npm.io/package/@opentelemetry/propagator-jaeger/versions

## README

# OpenTelemetry Propagator Jaeger

[![NPM Published Version][npm-img]][npm-url]
[![Apache License][license-image]][license-image]

> **Deprecated:** The Jaeger propagator is deprecated by the OpenTelemetry specification in favor of the [W3C TraceContext propagator](https://opentelemetry.io/docs/specs/otel/context/api-propagators/#propagators-distribution). Use `W3CTraceContextPropagator` from `@opentelemetry/core` instead. This package will be removed in a future major release.

OpenTelemetry Jaeger propagator provides HTTP header propagation for systems that are using Jaeger HTTP header format.

Format:
{trace-id}:{span-id}:{parent-span-id}:{flags}

- {trace-id}
  - 64-bit or 128-bit random number in base16 format.
  - Can be variable length, shorter values are 0-padded on the left.
  - Value of 0 is invalid.

- {span-id}
  - 64-bit random number in base16 format.

- {parent-span-id}
  - Set to 0 because this field is deprecated.
- {flags}
  - One byte bitmap, as two hex digits.

Example of usage:

```javascript
const { propagation } = require('@opentelemetry/api');
const { JaegerPropagator } = require('@opentelemetry/propagator-jaeger');

const propagator = new JaegerPropagator();
propagation.setGlobalPropagator(propagator);
```

## Baggage Notes

Jeager Baggage is represented as multiple headers where the names are carrier dependent. For this reason, they are omitted from the `fields` method. This behavior should be taken into account if your application relies on the `fields` functionality. See the [specification][fields-spec-url] for more details.

## Trace on Jaeger UI

![example image](jaeger-tracing.png)

## Useful links

- For more information on OpenTelemetry, visit: <https://opentelemetry.io/>
- For more about OpenTelemetry JavaScript: <https://github.com/open-telemetry/opentelemetry-js>
- For help or feedback on this project, join us in [GitHub Discussions][discussions-url]

## License

Apache 2.0 - See [LICENSE][license-url] for more information.

[discussions-url]: https://github.com/open-telemetry/opentelemetry-js/discussions
[license-url]: https://github.com/open-telemetry/opentelemetry-js/blob/main/LICENSE
[license-image]: https://img.shields.io/badge/license-Apache_2.0-green.svg?style=flat
[npm-url]: https://www.npmjs.com/package/@opentelemetry/propagator-jaeger
[npm-img]: https://badge.fury.io/js/%40opentelemetry%2Fpropagator-jaeger.svg
[fields-spec-url]: https://github.com/open-telemetry/opentelemetry-specification/blob/master/specification/context/api-propagators.md#fields

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_Source: https://npm.io/package/@opentelemetry/propagator-jaeger · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._