Developer Utilities — Format, Validate, Generate & Analyze

Essential tools for every developer: format and beautify code, generate UUIDs, encode/decode Base64, inspect JWT tokens, create cryptographic hashes, query CSV and Excel files, remove duplicates, and more. 100% client-side — your data never leaves your device.

✨ Data Formatter

Minify and Prettify JSON Minify or prettify JSON data with a single click. Format JSON for readability or compress it for transport. Formatter XML Formatter Format and indent XML documents for better readability. Pretty‑print XML with customizable indentation. Formatter HTML Beautifier Format and minify HTML code instantly. Beautify messy HTML or compress it for production. Formatter

🗄️ DB Formatter

SQL Formatter Format SQL queries for better readability. Pretty‑print SQL with customizable indentation and syntax highlighting. DB Formatter

📊 Analyze

Analyze Excel Upload an Excel file (.xlsx, .xls, .csv) and get instant analysis: summary, data types, and preview. Analyze

🔍 Query Tools

Query CSV Run SQL‑like queries on CSV files. Filter, aggregate, and transform data without writing code. Query Tools Query Excel Run SQL‑like queries on Excel spreadsheets. Filter, group, and analyze data instantly. Query Tools SQLite Viewer View and query SQLite databases directly in your browser. Browse tables and run SQL queries. Query Tools

🧹 Remove Duplicates

Remove Duplicates in SQL Learn how to find and remove duplicate records in SQL databases using practical queries. Remove Duplicates Remove CSV Duplicates Remove duplicate rows and values from CSV files quickly and easily. Clean your data in seconds. Remove Duplicates Remove Excel Duplicates Remove duplicate rows and values from Excel spreadsheets quickly and easily. Remove Duplicates

⚡ Code Generators

JSON to Dart Create Flutter‑ready model classes with fromJson/toJson methods from JSON data. Code Generators JSON to HTML Convert JSON to responsive HTML tables or nested lists for web display. Code Generators JSON to TypeScript Convert JSON data to TypeScript interfaces or classes with type safety. Code Generators JSON to Java Generate Java POJO classes from JSON data with proper fields and annotations. Code Generators JSON to C# Convert JSON data to C# classes with properties and JSON serialization attributes. Code Generators JSON to Go Structs Generate Go struct definitions from JSON data with JSON tags. Code Generators

🛠️ Data Generator

UUID Generator Generate UUID v4, v7, NanoID, ULID, and more – up to 1000 IDs at once. Data Generator Epoch Converter Convert Unix timestamps to human-readable dates and vice versa. Supports milliseconds and seconds. Data Generator Case Converter Convert text between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, and more. Data Generator

🔐 Encoding | Hashing

Base64 Encoder/Decoder Encode and decode Base64 data instantly in your browser. Supports UTF‑8 strings and files. Encoding | Hashing Hash Generator Generate cryptographic hashes (MD5, SHA-1, SHA-256, SHA-512) from any input string. Encoding | Hashing JWT Decoder Decode JSON Web Tokens (JWT) to inspect header, payload, and signature. Validate tokens instantly. Encoding | Hashing Decode A URL Decode percent-encoded URLs and query parameters instantly. Handle URL encoding without guesswork. Encoding | Hashing

✍️ Writing & Editing

Word Counter Count words, characters, sentences, readability scores, and keyword frequency. Perfect for writers and editors. Writing & Editing

Essential Developer Utilities — Format, Validate, Generate & More

DataFrog offers a comprehensive suite of free developer utilities covering formatting, validation, generation, encoding, hashing, and data analysis. Whether you're a developer, data analyst, or power user — you'll find the tools you need, all running locally in your browser with 100% privacy.

Code Formatters & Beautifiers

Keep your code clean and readable with our formatters for JSON, XML, HTML, and SQL. Prettify messy code or minify it for production — all in a single click. Perfect for developers who care about code quality.

Code Generators

Save hours of boilerplate work with our code generators. Convert JSON to Dart (Flutter models), TypeScript interfaces, Java POJOs, C# classes, and Go structs. Generate production‑ready code from sample JSON data instantly.

Data Generation & Manipulation

Generate UUIDs (v4, v7, NanoID, ULID), convert epoch timestamps, and change text case (camelCase, PascalCase, snake_case, kebab-case). Essential tools for developers working with IDs, dates, and naming conventions.

Encoding, Hashing & Security

Encode and decode Base64, inspect JWT tokens, generate cryptographic hashes (MD5, SHA-1, SHA-256, SHA-512), and decode URLs. All security tools run locally — your secrets never leave your device.

Query Tools & Data Analysis

Run SQL‑like queries on CSV and Excel files, view SQLite databases, and analyze Excel files instantly. Perfect for data analysts and developers working with structured data.

DataFrog utilities are trusted by developers worldwide — from software engineers and data scientists to QA engineers and DevOps professionals. No matter your role, DataFrog has a utility for your task.