---
title: "YAML to JSON — Parse Configs Anywhere, Local | Compress Pro"
description: "Convert YAML to JSON right in your browser — anchors resolved, pretty or minified output, nothing uploaded. Free, no accounts, works offline too."
canonical: https://compress-pro.com/yaml-to-json
---

# Convert YAML to JSON.

> YAML flattened to portable JSON — right on your device.

Convert YAML to JSON entirely in your browser — **anchors and aliases resolved, pretty or minified output, strict validation with real error messages**. Configs become portable JSON any tool can read. Nothing is uploaded.

**No uploads · No ads · Free & open source.**

## How it works

1. Drop files anywhere on the page, click to browse, or paste with Ctrl/⌘ + V.
2. Pick a quality or preset — or set an exact target size and let the tool find it.
3. Compress, compare before/after, and download — individually or as a ZIP.

## What conversion resolves

YAML’s conveniences are expanded into plain data: anchors and aliases become the values they reference, block scalars become normal strings, and the result is exactly what a YAML parser would hand your program — now portable to anything that speaks JSON. Comments have no JSON form and are dropped; that is inherent to the format, not a bug.

## Strict where it matters

Duplicate keys and syntax errors fail loudly with the parser’s message instead of guessing, and multi-document files are refused with a clear note rather than silently truncated. Dates written like 2024-01-15 stay strings — YAML 1.2 semantics, and what you want in JSON. The reverse trip is [JSON to YAML](https://compress-pro.com/json-to-yaml).

## Frequently asked questions

### What happens to anchors and aliases?

They are resolved — each alias becomes a full copy of the anchored value, which is exactly how any YAML-consuming program sees the data.

### Pretty or minified?

Your pick — 2-space pretty printing for reading and diffs, or minified single-line output for payloads. The toggle sits right on the page.

### Why was my file refused?

Usually a syntax error, a duplicate key, or a multi-document stream (---separated). The error message quotes the parser so you can fix the exact line.

### Is my data uploaded?

No. The conversion is plain parsing that runs entirely in your browser — the server only delivers this page. Kubernetes secrets and CI configs never leave your device. Want proof? Run one file through, switch your connection off, and run another — it still works.

## Related tools

- [Convert JSON to YAML](https://compress-pro.com/json-to-yaml)
- [Convert CSV to XLSX](https://compress-pro.com/csv-to-xlsx)
- [Compress PDFs](https://compress-pro.com/compress-pdf)

---

Part of [Compress Pro](https://compress-pro.com/) — every tool page has a markdown twin at `<page url>.md`. Full tool index: [llms.txt](https://compress-pro.com/llms.txt)