Is there a file size limit?

The converter is optimised for typical web datasets. Very large files may impact performance; split them when necessary.

Does the tool infer data types?

Numeric and boolean values remain preserved during conversions. Strings with leading zeros stay intact.

Can I change CSV delimiters?

Yes. Switch between comma, semicolon, or tab delimiters before exporting.

Is any data uploaded?

No. Conversions run locally inside your browser using lightweight parsers.

Convert Between CSV, JSON, and YAML Instantly

Paste structured data, detect schemas automatically, and export the format your pipeline needs without installing CLI tools.

Input:Output:

Drop file or

0 bytes

CSV Options

Delimiter:Header rowQuote:Newline:Add UTF-8 BOM

JSON Options

Pretty:Root:

Uses a safe subset (no anchors/tags).

Overview

Mixing data formats is common when juggling analytics dashboards, APIs, and static site generators. Our converter bridges these worlds with a single interface.

Conversions happen locally, so sensitive datasets remain on your machine. Validate structure and catch errors before committing changes.

Key features

Bidirectional conversion
Convert CSV to JSON or YAML, JSON to CSV, and more with a single click. The tool auto-detects headers and nested structures.
Schema validation
Receive clear error messages when data cannot be parsed, helping you fix issues before importing into other systems.
Download & copy
Export results as downloadable files or copy them to the clipboard for quick integrations.
Whitespace & formatting controls
Adjust indentation, delimiters, and quoting preferences to match your project standards.

How it works

1
Paste or upload data
Drop your source data into the left pane or upload a file. The tool auto-detects the format.
2
Choose output format
Select JSON, CSV, or YAML. The preview updates immediately with formatted results.
3
Review validation messages
Fix any highlighted parsing issues, such as mismatched columns or invalid JSON syntax.
4
Export or copy
Download the converted file, copy it to your clipboard, or send it to another Infinite Curios tool.

Use cases

Static site content

Convert spreadsheets into YAML front matter for static site generators like Astro or Next.js.

API prototyping

Transform JSON responses into CSV for quick spreadsheet analysis during discovery phases.

Data cleaning

Switch between formats while normalising field names, then re-export for downstream workflows.

Examples & tips

Turn product data into YAML

Paste CSV exports from your commerce platform and convert them into structured YAML for CMS imports.

Create API fixtures

Import JSON, prettify it, and export to share as sample payloads with your engineering team.

Clean a dataset for machine learning

Convert YAML configuration into JSON, adjust formatting, and send it to your notebooks for training.

Pro tips

Combine the converter with the Regex Tester to clean data before exporting.
Use the Robots & Sitemap Generator after converting URL lists to ensure search engines discover new pages.

Frequently asked questions

Is there a file size limit?: The converter is optimised for typical web datasets. Very large files may impact performance; split them when necessary.
Does the tool infer data types?: Numeric and boolean values remain preserved during conversions. Strings with leading zeros stay intact.
Can I change CSV delimiters?: Yes. Switch between comma, semicolon, or tab delimiters before exporting.
Is any data uploaded?: No. Conversions run locally inside your browser using lightweight parsers.

Resources & internal links

Related tools