# @turf/simplify

> Reduces the number of points in a shape while keeping its overall look.

Latest version **7.4.0** (published 2026-08-03) · MIT license · 0 weekly downloads

## Install

```sh
npm install @turf/simplify
pnpm add @turf/simplify
yarn add @turf/simplify
bun add @turf/simplify
```

## Health

**Score 80/100 (A)** — status: active.

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

Warnings: low downloads.

## Facts

| | |
|---|---|
| Version | 7.4.0 |
| Published | 2026-08-03 |
| First published | 2016-07-06 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | bundled |
| Module format | ESM + CommonJS |
| Dependencies | 6 |
| Unpacked size | 46.2 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| Provenance | attested (GitHub Actions) |
| GitHub stars | 10482 |
| Author | Turf Authors |
| Maintainers | rowanwins, tmcw, morganherlocker, tcql, mdfedderly, twelch, jamesmilneruk, morgan.herlocker |
| Keywords | turf, gis, simplify, Ramer-Douglas-Peucker, algorithm, peucker |

## Links

- npm: https://www.npmjs.com/package/@turf/simplify
- Repository: https://github.com/Turfjs/turf
- Issues: https://github.com/Turfjs/turf/issues
- Funding: https://opencollective.com/turf
- npm.io page: https://npm.io/package/@turf/simplify

## Dependencies (6)

- [tslib](https://npm.io/package/tslib.md) ^2.8.1
- [@turf/meta](https://npm.io/package/@turf/meta.md) 7.4.0
- [@turf/clone](https://npm.io/package/@turf/clone.md) 7.4.0
- [@turf/helpers](https://npm.io/package/@turf/helpers.md) 7.4.0
- [@types/geojson](https://npm.io/package/@types/geojson.md) ^7946.0.10
- [@turf/clean-coords](https://npm.io/package/@turf/clean-coords.md) 7.4.0

## Recent versions

- 7.4.0 (latest) — 2026-08-03
- 7.1.0-alpha.70 (prerelease) — 2024-08-09
- 3.5.2-alpha.d2c36ee7 (canary) — 2016-11-04
- 7.3.5 — 2026-04-19
- 7.3.4 — 2026-02-08
- 7.3.3 — 2026-01-28
- 7.3.2 — 2026-01-14
- 7.3.1 — 2025-11-27
- 7.3.0 — 2025-11-17
- 7.2.0 — 2024-12-29
- 7.1.0 — 2024-08-09
- 7.1.0-alpha.7 — 2024-06-25
- 7.0.0 — 2024-06-07
- 7.0.0-alpha.116 — 2024-05-07
- 7.0.0-alpha.115 — 2024-04-23
- … 41 more at https://npm.io/package/@turf/simplify/versions

## README

# @turf/simplify

<!-- Generated by documentation.js. Update this documentation by updating the source code. -->

## simplify

Simplifies the geometries in a GeoJSON object. Uses the 2d version of
[simplify-js][1].

### Parameters

*   `geojson` **[GeoJSON][2]** GeoJSON object to be simplified
*   `options` **[Object][3]** Optional parameters (optional, default `{}`)

    *   `options.tolerance` **[number][4]** Simplification tolerance (optional, default `1`)
    *   `options.highQuality` **[boolean][5]** Produce a higher-quality simplification using a slower algorithm (optional, default `false`)
    *   `options.mutate` **[boolean][5]** Allow GeoJSON input to be mutated (significant performance improvement if true) (optional, default `false`)

### Examples

```javascript
const geojson = turf.polygon([[
  [-70.603637, -33.399918],
  [-70.614624, -33.395332],
  [-70.639343, -33.392466],
  [-70.659942, -33.394759],
  [-70.683975, -33.404504],
  [-70.697021, -33.419406],
  [-70.701141, -33.434306],
  [-70.700454, -33.446339],
  [-70.694274, -33.458369],
  [-70.682601, -33.465816],
  [-70.668869, -33.472117],
  [-70.646209, -33.473835],
  [-70.624923, -33.472117],
  [-70.609817, -33.468107],
  [-70.595397, -33.458369],
  [-70.587158, -33.442901],
  [-70.587158, -33.426283],
  [-70.590591, -33.414248],
  [-70.594711, -33.406224],
  [-70.603637, -33.399918]
]]);
const result0_01 = turf.simplify(geojson, {tolerance: 0.01 });
const result0_005 = turf.simplify(geojson, {tolerance: 0.005 });

//addToMap
const addToMap = [geojson, result0_01, result0_005]
```

Returns **[GeoJSON][2]** Simplified GeoJSON

[1]: https://mourner.github.io/simplify-js/

[2]: https://tools.ietf.org/html/rfc7946#section-3

[3]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object

[4]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number

[5]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Boolean

<!-- This file is automatically generated. Please don't edit it directly. If you find an error, edit the source file of the module in question (likely index.js or index.ts), and re-run "yarn docs" from the root of the turf project. -->

---

This module is part of the [Turfjs project](https://turfjs.org/), an open source module collection dedicated to geographic algorithms. It is maintained in the [Turfjs/turf](https://github.com/Turfjs/turf) repository, where you can create PRs and issues.

### Installation

Install this single module individually:

```sh
$ npm install @turf/simplify
```

Or install the all-encompassing @turf/turf module that includes all modules as functions:

```sh
$ npm install @turf/turf
```

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