JSON, Data & Formatter Tools
JSON Formatter & Validator
Format, validate, minify, and tree-view JSON data. Detects trailing commas, shows error position with context. All processing happens in the browser -- no data sent anywhere.
Tools
Free JSON, Data & Formatter Tools
Format, validate, compare, convert, and inspect JSON, YAML, CSV, text, timestamps, cron expressions, and query strings.
Available tools
JSON, Data & Formatter Tools you can use now
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JSON, Data & Formatter Tools
JSON to CSV Converter
Convert JSON arrays to CSV/TSV with configurable delimiter, optional header row, nested field flattening via dot notation, and download-ready output.
JSON, Data & Formatter Tools
YAML JSON Converter
Bidirectional YAML to JSON and JSON to YAML converter. Handles nested objects, arrays, and scalar values. Useful for config files, GitHub Actions, front matter, and Docker Compose.
JSON, Data & Formatter Tools
JSONPath Tester
Test JSONPath expressions against JSON data. Supports dot notation, bracket notation, wildcards, array indices, and filter expressions. Shows matched values with paths.
JSON, Data & Formatter Tools
JSON Schema Generator & Validator
Generate JSON Schema from sample JSON data, or validate JSON against an existing schema. Supports Draft 04/07/2020-12. Infers types, marks required fields, includes examples.
JSON, Data & Formatter Tools
Regex Tester and Debugger
Test regular expressions against text with match highlighting, capture groups, and replacement preview. All processing is local in the browser.
JSON, Data & Formatter Tools
Query String Parser and Builder
Parse URL query strings into key-value tables, or build query strings from parameters. Detects duplicates and sorts parameters.
JSON, Data & Formatter Tools
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates with timezone support
JSON, Data & Formatter Tools
Cron Expression Builder
Build and understand cron schedule expressions with presets or custom fields
JSON, Data & Formatter Tools
Text Diff Checker
Compare two texts line-by-line or side-by-side with visual highlighting
JSON, Data & Formatter Tools
Markdown Preview Editor
Split-screen Markdown editor with live GitHub-Flavored Markdown preview. Supports headings, bold/italic, links, code blocks, tables, and task lists.
What this collection helps with
Structured data problems often appear between systems: an API response needs validation, YAML must become JSON, a timestamp needs interpretation, or two text versions need comparison. These tools keep that work local and make each transformation visible before you copy the result.
Best for
- Developers inspecting API payloads and configuration files.
- Publishers converting structured content between common formats.
- Anyone who needs a quick, inspectable formatter or comparison result.
Common use cases
- Format and validate JSON before committing a configuration file.
- Convert JSON to CSV or YAML to JSON without uploading source data.
- Test JSONPath, regex, timestamps, cron expressions, and query parameters.
Task guide
Choose the tool that matches the format you already have and the result you need. Validate before converting when possible, because a formatter cannot repair ambiguous or missing data. Review field names, data types, time zones, delimiters, and escaping in the output before using it in an API, spreadsheet, build file, or published page.
Publishing checklist
- Confirm the input format and character encoding before conversion.
- Review numbers, booleans, null values, dates, and nested structures after formatting.
- Check delimiter and quoting behavior when producing CSV.
- Test expressions against representative data, not only a single simple example.
- Keep a copy of the original input until the transformed output is verified.
FAQ
Questions about json, data & formatter tools
Does formatting JSON change its data?
Formatting should only change whitespace and indentation. Validation and conversion tools may expose invalid syntax or change representation, so compare the result before replacing the original file.
Is pasted data uploaded?
The current data tools run in your browser. Input is processed locally and is not intentionally sent to a jquery.app application server.
Can these tools handle very large files?
They are designed for everyday browser-sized inputs. Very large files can use substantial memory or make the tab unresponsive, so use a streaming command-line or desktop tool for large datasets.