Small utility · Precise result

Find the key.
Keep the value.

Recursively search for keys inside JSON objects and retrieve their values.

npm install key-searcher

View on npm

MIT
zero dependencies
ESM
3.3 kB unpacked

Growth story

1,090 downloads since launch

Goal 10k daily downloads

npm registry API · weekly · Mar 23 – Aug 10, 2026

Weekly npm downloads for key-searcher
Week starting	Downloads
2026-03-23	395
2026-03-30	14
2026-04-06	7
2026-04-13	9
2026-04-20	10
2026-04-27	6
2026-05-04	5
2026-05-11	10
2026-05-18	5
2026-05-25	5
2026-06-01	16
2026-06-08	17
2026-06-15	6
2026-06-22	7
2026-06-29	17
2026-07-06	16
2026-07-13	1
2026-07-20	10
2026-07-27	1
2026-08-03	7
2026-08-10	526

Live playground

Search the structure.

Edit the strict JSON and choose the keys to retrieve. The result updates as you type and preserves matched subtrees.

Input Strict JSON

Result 3 requested

Result updated.

Works in the browser. Zero dependencies.

The story

From painful JSON to a tiny, focused tool.

It began as a small internal utility for messy JSON and repetitive data hunting.

It was published quietly on 2026-03-23. It has 1,090 downloads to date, and the goal is to keep it small and do one thing well.

Adonis Nuñez

Founder / CEO

Without types 😎 you don’t need them when you don’t know what you are parsing. — Adonis Nuñez

No hype. Just utility.

No AI wrappers.
No magic hype.
Just a utility that solves a real problem.

No proxies. No cloud.
No data leaves your machine.
Simple, predictable, reliable.

Features

Recursive search

Traverses objects recursively to find matching keys.

Finds keys at any depth

Matches keys wherever they are nested.

Preserves matched subtrees

Keeps the entire object beneath a matched key.

Does not mutate input

Returns a new object and leaves the source untouched.

Example

One import. One call.

key-searcher is ESM-only and exposes a single default export.

import searchIn from "key-searcher";

const obj1 = {
  key1: false,
  key2: {
    key3: "val2",
    key4: {
      key5: "val3",
      key6: { key7: "val4", key8: { key9: "val5" } },
    },
    key5: "val4",
  },
  key10: { key11: "val6" },
};

const newJSON = searchIn(obj1, "key25", "key1", "key6");
// { key25: undefined, key1: false, key6: { key7: 'val4', key8: { key9: 'val5' } } }

Use cases

Filtering API responses

Keep only the fields needed from noisy responses.

Extracting deeply nested fields

Pull values from complex JSON structures.

Cleaning large JSON structures

Return only the requested keys and their values.