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All live tools plus category and company pages on CodingFormatter.
Tools
- JSON Formatter - Pretty-print, minify, and validate JSON online.
- XML Formatter - Pretty-print, minify, and validate XML markup.
- HTML Formatter - Format and minify HTML with syntax-aware indentation.
- SQL Formatter - Beautify SQL across MySQL, PostgreSQL, T-SQL, and more.
- YAML Validator - Validate YAML syntax with precise line and column errors.
- JavaScript Validator - Check JavaScript syntax without executing your code.
- CSV to JSON - Convert CSV or TSV into a JSON array of objects.
- JSON to YAML - Convert JSON objects to clean YAML.
- YAML to JSON - Convert YAML documents to pretty-printed JSON.
- Base64 Encoder - Encode text to Base64 with full UTF-8 support.
- Base64 Decoder - Decode Base64 to UTF-8 text safely in your browser.
- JWT Decoder - Decode JWT header and payload - never sent to a server.
- HTML Beautifier - Beautify HTML with indent, wrap length, and attribute controls.
- Regex Tester - Test regex patterns against sample text with match offsets and capture groups.
- JSON Path Evaluator - Evaluate JSONPath expressions against JSON documents.
- XPath Evaluator - Evaluate XPath against XML or HTML in your browser.
- HTML Validator - Structural HTML lint - unclosed tags, duplicate ids, and common issues.
- Redirection Checker - Check URL reachability and redirect hints from your browser.
- Link Checker - Bulk-check links extracted from HTML or a URL list.
- JSONPath Finder - Find JSONPath expressions for a key or value in JSON.
- Diff Checker - Compare two text or code files side-by-side or unified.
- JSON to Protobuf - Generate a draft .proto schema from sample JSON.
- JSON to Java - Generate Java POJO classes from JSON.
- JSON to XML - Convert JSON objects to XML markup.
- JSON to PHP - Convert JSON to PHP array syntax.
- JSON to C# - Generate C# classes from JSON.
- XML to XSD - Generate a draft XSD schema from sample XML.
- XML to YAML - Convert XML documents to YAML.
- XML to JSON - Convert XML to JSON with attribute prefixes.
- SQL to MongoDB - Convert basic SELECT queries to MongoDB find().
- INI to JSON - Convert INI config files to JSON.
- INI to XML - Convert INI files to XML markup.
- INI to YAML - Convert INI files to YAML.
- CSV to XML - Convert CSV rows to XML elements.
- CSV to YAML - Convert CSV to a YAML list of records.
- CSV to SQL - Generate SQL INSERT statements from CSV.
- Image to Data URI - Convert images to Base64 data URIs in your browser.
- Data URI to Image - Preview and inspect image data URIs.
- RGB to Hex - Convert RGB, RGBA, or HSL colors to hex with a live swatch.
- Hex to RGB - Convert hex colors to RGB/RGBA with a live swatch.
- Epoch Converter - Convert Unix timestamps to dates and back with timezones and a live clock.
- IDN Converter - Convert internationalized domain names between Unicode and Punycode.
- HAR Sanitizer - Redact secrets from HAR archives before sharing.
- HTML Encoder / Decoder - Encode or decode HTML entities in your browser.
- JavaScript String Escaper / Unescaper - Escape or unescape JavaScript string contents.
- XML String Escaper / Unescaper - Escape or unescape XML special characters.
- SVG Viewer - Preview SVG markup safely in your browser.
- LLM Token Counter - Count GPT tokens across models. 100% client-side.
- Context Window Calculator - See how much of a model context window a prompt plus expected output would use.
- Prompt Diff Checker - Compare two prompt versions with a line or word diff. 100% client-side.
- LLM JSON Schema Validator - Validate structured LLM JSON output against a JSON Schema. Client-side Ajv.
- Function Calling Schema Generator - Infer an OpenAI or Anthropic tool schema from sample JSON.
- Prompt Template Linter - Lint mustache, Jinja, and LangChain prompt templates for delimiter and variable issues.
- Embedding Cosine Similarity Calculator - Compute cosine similarity, dot product, and Euclidean distance for two embedding vectors.
- Prompt Minifier - Strip markdown and extra whitespace from prompts to save tokens.