JSON and data formatting
Format structured data, move between CSV and JSON, and generate schema or TypeScript output.
Category
Developer tools
Small formatting and data utilities for everyday development work.
Developer category paths
Use this category hub to move between the full catalog, sibling categories, priority tools, and supporting guides.
Text toolsCount, rewrite, and transform text directly in your browser.Encoding toolsEncode, decode, and convert common data formats without uploading files.SEO toolsBuild campaign URLs, preview search snippets, and prepare pages for discovery.All toolsThe complete utility catalog.Workflow guidesShort explanations that connect tools to real tasks.SearchFind a utility by format, task, or workflow.HTML sitemapA full crawlable index of public pages.Word CounterChecking article, essay, and description length before publishing.Character CounterChecking short bios, titles, descriptions, and form-field copy.Case ConverterChanging headings, labels, file names, and short text snippets.Whitespace CleanerCleaning text copied from PDFs, emails, documents, and spreadsheets.JSON FormatterPretty-printing JSON responses, config snippets, and copied payloads.JSON Schema Generator From JSONGenerating a first-pass JSON Schema from an example JSON object or array.YAML FormatterCleaning pasted YAML config before adding it to docs or source control.Unix Timestamp ConverterConverting Unix epoch values from logs, APIs, databases, and support tickets.URL Encoder / DecoderEncoding URL components, query values, and reserved characters.UUID GeneratorCreating quick test IDs for fixtures, mock data, and examples.XML Formatter and ValidatorPretty-printing XML snippets, feeds, config files, and API samples.Text Diff CheckerComparing two versions of copied text.
Related workflows
URLs, encoding, and campaign links
Parse URLs, encode values, decode text-safe formats, and build tagged campaign links.
Developer helpers
Generate IDs, convert timestamps, compare text, and format code-adjacent snippets quickly.
Start here
| Tool | Use it when | Pairs well with |
|---|---|---|
| JSON Formatter | Pretty-printing JSON responses, config snippets, and copied payloads. | JSON Schema, TypeScript Types, YAML |
| YAML Formatter | Cleaning pasted YAML config before adding it to docs or source control. | JSON, JSON Schema, XML |
| CSV to JSON Converter | Turning spreadsheet exports into JSON for docs, tests, and prototypes. | JSON to CSV, JSON, JSON Schema |
| JSON to CSV Converter | Converting API response samples into spreadsheet-friendly CSV. | CSV to JSON, JSON, JSON Schema |
All Developer tools
JSON Formatter
Format, minify, and validate JSON in your browser.
DeveloperJSONDeveloper
YAML Formatter
Format YAML, clean indentation, and catch common YAML structure issues in your browser.
DeveloperYAMLDeveloper
CSV to JSON Converter
Convert pasted CSV into JSON arrays or rows locally in your browser.
DeveloperCSVJSON
JSON to CSV Converter
Convert JSON arrays or flat objects into CSV locally in your browser.
DeveloperJSONCSV
JSON Schema Generator From JSON
Paste example JSON and generate a starter JSON Schema in your browser.
DeveloperJSONSchema
TypeScript Type Generator
Generate TypeScript interfaces and types from pasted JSON examples locally in your browser.
DeveloperTypeScriptJSON
UUID Generator
Generate UUID v4 values, bulk UUID batches, and UUID reference values locally in your browser.
DeveloperUUIDDeveloper
Unix Timestamp Converter
Convert Unix timestamps to dates and readable dates back to epoch values in seconds and milliseconds.
DeveloperTimestampUnix Time
URL Parser
Parse a URL into protocol, host, path, query parameters, and fragment without fetching the page.
DeveloperURLQuery String
XML Formatter and Validator
Format XML, clean indentation, and check XML parse errors in your browser.
DeveloperXMLDeveloper
SQL Formatter
Format, minify, and clean up SQL queries in your browser.
DeveloperSQLDeveloper
Text Diff Checker
Compare two text blocks and highlight added, removed, and unchanged text.
DeveloperDiffText
How these Developer tools fit together
| Tool | Best for | Next step |
|---|---|---|
| JSON Formatter | Pretty-printing JSON responses, config snippets, and copied payloads. | JSON Schema, TypeScript Types |
| YAML Formatter | Cleaning pasted YAML config before adding it to docs or source control. | JSON, JSON Schema |
| CSV to JSON Converter | Turning spreadsheet exports into JSON for docs, tests, and prototypes. | JSON to CSV, JSON |
| JSON to CSV Converter | Converting API response samples into spreadsheet-friendly CSV. | CSV to JSON, JSON |
| JSON Schema Generator From JSON | Generating a first-pass JSON Schema from an example JSON object or array. | JSON, TypeScript Types |
| TypeScript Type Generator | Drafting TypeScript interfaces from API response samples. | JSON, JSON Schema |
| UUID Generator | Creating quick test IDs for fixtures, mock data, and examples. | JSON, JSON Schema |
| Unix Timestamp Converter | Converting Unix epoch values from logs, APIs, databases, and support tickets. | JSON, TypeScript Types |
| URL Parser | Inspecting URL parts before debugging redirects, links, or campaign URLs. | |
| XML Formatter and Validator | Pretty-printing XML snippets, feeds, config files, and API samples. | YAML, JSON |
| SQL Formatter | Making pasted SQL easier to read before review. | JSON, YAML |
| Text Diff Checker | Comparing two versions of copied text. | SQL, JSON |
Developer guides
How to Make a Markdown Table for a GitHub README
Create a Markdown table for a GitHub README, align columns, escape pipe characters, and convert CSV or TSV with Tidy Utils.
JSON vs SQL Formatting: What Formatters Do and Do Not Validate
Compare JSON and SQL formatting, see what each formatter checks, and learn when syntax, schema, dialect, or database validation still matters.
JSON Format vs Minify
Understand when to format JSON for readability, when to minify it, and when to compare output with a text diff.
Generate a JSON Schema From Example JSON
Learn what a JSON Schema generator can infer from example JSON, what it cannot know, and how to review the schema before use.
Generate a TypeScript Interface From JSON
Turn JSON examples into TypeScript interfaces, understand optional fields, and review inferred unions before using generated code.
XML Formatting vs XML Validation
Understand the difference between pretty-printing XML, checking well-formed XML, and validating against an XML schema.
UUID v4 vs UUID v7
Compare UUID v4 and UUID v7, learn when random UUIDs are enough, and understand what Tidy Utils generates today.
Unix Timestamp Seconds vs Milliseconds
Learn how to tell Unix timestamp seconds from milliseconds, convert both safely, and avoid common timezone mistakes.
URL Parts and Query Parameters Explained
Break down protocol, host, path, query parameters, fragments, encoding, and UTM values before debugging or sharing a URL.
Robots.txt Allow and Disallow Rules Explained
Learn how robots.txt user-agent groups, Allow and Disallow paths, and most-specific matching work before testing crawler access.