# Is safe-stable-stringify ESM-only? Can you require() it?

> safe-stable-stringify@2.5.0 ships CommonJS and ESM builds. Dual package — require() works on every Node.js version we test; import works too.

Deterministic and safely JSON.stringify to quickly serialize JavaScript objects

Last verified Sep 9, 2026 against safe-stable-stringify@2.5.0.

safe-stable-stringify publishes both a CommonJS entry and a native ESM entry (ESM added in 2.0.0). require("safe-stable-stringify") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=10. import "safe-stable-stringify" works alongside it.

## What to do

1. Nothing to change. require("safe-stable-stringify") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=10. import * as safeStableStringify from "safe-stable-stringify" works alongside it; use named imports for what the ESM entry exports.
2. TypeScript: types are bundled; install nothing extra.

## Facts

- Latest: 2.5.0 (Aug 24, 2024)
- Module format: Dual (CommonJS + ESM)
- Last CommonJS version: 2.5.0
- Native ESM since: 2.0.0
- TypeScript types: bundled
- Node engines: >=10
- Weekly downloads: 52.2M
- License: MIT

## Runtime test results for safe-stable-stringify@2.5.0

Installed and executed on Sep 9, 2026 with require("safe-stable-stringify") from a CommonJS file and import "safe-stable-stringify" from an ES module.

| Runtime | require("safe-stable-stringify") | import "safe-stable-stringify" |
|---|---|---|
| Node.js 18 | works | works |
| Node.js 20 | works | works |
| Node.js 22 | works | works |
| Node.js 24 | works | works |
| Node.js 26 | works | works |
| Bun 1.4.0 | works | works |

## How to import safe-stable-stringify

ES modules:

```js
import * as safeStableStringify from "safe-stable-stringify";
```

Namespace import shown because the ESM entry may have no default export; use named imports for what it exports.

CommonJS:

```js
const safeStableStringify = require("safe-stable-stringify");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (13 versions; the newest 13 shown).

| Versions | Format | First published |
|---|---|---|
| 2.0.0 – 2.5.0 | Dual (CommonJS + ESM) | Sep 19, 2021 |
| 1.0.1 – 1.1.1 | CommonJS | Jan 24, 2018 |

## Frequently asked

**Is safe-stable-stringify ESM-only?**

safe-stable-stringify@2.5.0 ships CommonJS and ESM builds. safe-stable-stringify publishes both a CommonJS entry and a native ESM entry (ESM added in 2.0.0). require("safe-stable-stringify") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=10. import "safe-stable-stringify" works alongside it.

**Can I require safe-stable-stringify?**

Yes. safe-stable-stringify ships a CommonJS entry alongside the native ESM entry. require("safe-stable-stringify") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=10.

**Does safe-stable-stringify work in Bun?**

Yes. import "safe-stable-stringify" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does safe-stable-stringify ship TypeScript types?**

Yes. safe-stable-stringify bundles its own type declarations; no @types package is needed.

## Links

- [safe-stable-stringify on npm](https://www.npmjs.com/package/safe-stable-stringify)
- [Source repository](https://github.com/BridgeAR/safe-stable-stringify)
- [HTML version](https://canirequire.com/package/safe-stable-stringify/)
- [JSON version](https://canirequire.com/package/safe-stable-stringify.json)

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