Data Processing
Format, validate and convert data without uploading it anywhere: JSON, YAML, XML, CSV, Base64, timestamps, SQL and more. Every converter runs client-side in your browser.
54 free tools — no ads, no sign-up, everything runs in your browser.
Base64 Toolbox
Professional Base64 workspace for text, files and images with Base64URL, MIME, Data URI, strict validation, image preview and ready-to-use snippets.
C# to VB.NET Converter
Convert a subset of C# — classes, methods, variables, loops — into VB.NET
CSV Data Viewer
Paste CSV and browse rows in a sortable table with delimiter detection
CSV to Chart
Paste or upload CSV data and generate bar, line, pie, or doughnut charts. Export as PNG.
CSV to JSON Converter
Paste CSV data and convert it to pretty-printed JSON instantly — supports custom delimiters, header row toggling, and value trimming.
CSV to Markdown Converter
Convert CSV to a Markdown table and Markdown tables back to CSV
CSV to SQL Converter
Generate SQL INSERT statements from CSV data
DB Migration Script Generator
Compare old and new CREATE TABLE DDL and generate PostgreSQL, MySQL, or SQLite migration scripts
Diff Checker
Compare two text blocks and highlight differences side-by-side
Ephemeris Calculator
Compute tropical longitudes, RA and declination for the Sun, Moon and planets offline.
ER Diagram Generator
Parse CREATE TABLE SQL DDL into entity-relationship diagrams with foreign key lines
GraphQL Formatter & Validator
Format, validate and beautify GraphQL queries with syntax highlighting
GZip Compressor
Compress and decompress text with gzip, deflate, or deflate-raw
HTML Encoder/Decoder
Encode and decode HTML entities. Convert special characters to HTML entities and back. Perfect for displaying code safely in HTML.
HTML to Text Converter
Convert HTML to plain text by removing all HTML tags and entities. Extract readable text from HTML documents.
Java to Kotlin Converter
Convert a subset of Java — classes, methods, variables, loops, println — into idiomatic Kotlin
JSON ⇄ YAML Converter
Bidirectional JSON/YAML conversion with advanced formatting options, auto-detection, file upload, and comprehensive statistics
JSON Formatter
Advanced JSON formatter with validation, analysis, search, multiple format modes, file upload, and comprehensive statistics.
JSON Lines Converter
Convert JSON Lines (NDJSON) to a JSON array and back
JSON Schema Builder
Build a JSON Schema or MongoDB $jsonSchema validator visually — add properties, pick types, mark required, set patterns and ranges — with live output and a test document.
JSON Schema Validator
Validate a JSON document against a JSON Schema
JSON to CSV Converter
Professional JSON to CSV conversion with nested object flattening, multiple delimiters, file upload, and comprehensive statistics
JSON to Protobuf Converter
Infer a proto3 (.proto) schema from a JSON sample — types, nested messages, and repeated fields
JSON5 Validator
Validate and format JSON5 (comments, trailing commas, unquoted keys, single quotes)
JSONPath Evaluator
Paste JSON and a JSONPath expression to instantly see all matched values. Supports filters, wildcards, recursive descent, and array slices.
List & CSV Deduplicator
Remove duplicates from newline-separated lists or dedupe CSV rows by any column — order-preserving, case options, runs entirely in your browser.
Local Sidereal Time
Julian Date, GMST and LST from UTC and longitude.
MongoDB Query Builder
Build MongoDB find filters and aggregate pipelines from visual rows — field, operator, value — copy JSON or shell output
Moon Phase & Eclipse Predictor
Moon illumination, upcoming lunations and solar or lunar eclipses.
NoSQL Validator
Validate a JSON document against a JSON Schema or MongoDB $jsonSchema. Get clear, path-precise errors for missing fields, wrong types, patterns, ranges, and disallowed properties.
Number Base Converter
Convert numbers between different bases: Binary, Octal, Decimal, and Hexadecimal
Planet Aspects & Retrogrades
Scan major aspects and retrograde stations, then export iCal or JSON.
Plist JSON XML Converter
Convert Apple Property List files between XML plist and JSON formats
Python to JavaScript Converter
Convert a subset of Python (print, control flow, def, f-strings, lists) into JavaScript
SOAP Formatter
Beautify SOAP XML request and response envelopes with indentation
SQL Builder
Build SQL SELECT queries by dragging clause blocks — learn how each clause works and copy ready-to-run SQL for 11 dialects.
SQL Compare
Compare two SQL queries and highlight the differences side by side — normalizes formatting first so only real changes show.
SQL Formatter
Format, beautify and minify SQL for 11 dialects, or compare two queries side by side — a two-in-one SQL toolkit.
SQL Performance Analyzer
Paste a SQL query to find performance anti-patterns — SELECT *, leading-wildcard LIKE, missing WHERE, cross joins, NOT IN, functions on columns — with a score and ranked fixes.
Stored Procedure Formatter
Format T-SQL, PL/SQL, and PL/pgSQL stored procedures with dialect-aware indentation and keyword casing
Temperature Converter
Convert temperatures between Celsius, Fahrenheit, and Kelvin
Time Zone Converter
Convert time between different time zones worldwide with automatic DST handling
Timestamp Converter
Convert between Unix timestamps and human-readable dates with timezone support, multiple formats, and comprehensive date analysis
TOML to JSON Converter
Convert TOML to JSON and JSON to TOML in either direction
TOML Validator
Validate TOML and re-emit it as clean, indented JSON
Twitter Card Validator
Inspect twitter: meta tags from pasted HTML to debug Twitter/X link cards
TypeScript to JavaScript Converter
Strip TypeScript types — annotations, interfaces, generics, enums — into runnable JavaScript
URL Encoder/Decoder
Encode and decode URLs with multiple modes, auto-detection, file upload, and comprehensive analysis
Visual SQL Query Builder
Build a SELECT statement visually — table, columns, WHERE conditions, GROUP BY, ORDER BY, and LIMIT — and copy the generated SQL
WSDL Formatter
Beautify WSDL XML service descriptions with indentation
XML Formatter & Validator
Format, validate, and analyze XML documents with comprehensive options, element/attribute counting, and detailed validation
XML to JSON Converter
Convert XML data to JSON format with attribute handling, configurable parsing options, and live statistics
YAML to TOML Converter
Convert YAML configuration to TOML format with proper syntax and validation
YAML Validator
Validate and lint YAML in your browser. Catch syntax errors with line numbers and preview the parsed JSON output. Nothing leaves your device.