Code & Data
Code & Data Tools
Format, validate, convert, compare, encode, decode, and clean anything in seconds.
Smart Paste workspace
Paste anything, detect the type, then jump into the right formatter, converter, parser, or validator.113 tools
Matching Tools
All Code & Data utilities use the same LazyStudents card style, copy flow, and local browser-first processing.
JSON Formatter
Clean, validate, repair, inspect, and export JSON.
JSON Minifier
Compress JSON, compare size savings, and export compact data.
HTML Formatter
Format HTML, inspect structure, and extract useful page details.
HTML Minifier
Remove safe whitespace and comments from HTML snippets.
CSS Formatter
Format CSS and inspect selectors, declarations, media queries, and colors.
CSS Minifier
Remove unnecessary CSS whitespace and comments.
JavaScript Formatter
Format JavaScript safely without executing code.
JavaScript Minifier
Compact JavaScript snippets without running them.
TypeScript Formatter
Format TypeScript snippets while preserving types and interfaces.
SQL Formatter
Format queries with dialect and keyword controls.
XML Formatter
Beautify XML and catch basic structure problems.
YAML Formatter
Clean YAML spacing and report common indentation issues.
Markdown Formatter
Clean Markdown spacing, preserve code blocks, and preview structure.
GraphQL Formatter
Format GraphQL operations and inspect operation details.
JSON Validator
Validate strict JSON or repair common mistakes with clear explanations.
HTML Validator
Check for common unclosed HTML tags and malformed structure.
CSS Validator
Run lightweight CSS syntax checks for braces, comments, and declarations.
XML Validator
Validate XML structure with helpful messages.
YAML Validator
Validate common YAML indentation and key structure.
URL Validator
Check URL format and extract protocol, host, path, query, and hash.
Email Validator
Check basic email syntax locally without sending or storing it.
UUID Validator
Validate UUID v1, v3, v4, and v5 style formats where possible.
JWT Validator
Validate JWT structure and decode header and payload without signature verification.
JSON to CSV
Flatten JSON arrays, preview columns, and export CSV.
CSV to JSON
Parse CSV safely, preview rows, and export structured JSON.
JSON to XML
Convert a JSON object or array into XML text.
XML to JSON
Convert XML into a basic JSON representation.
JSON to YAML
Convert JSON into readable YAML.
YAML to JSON
Convert simple YAML into formatted JSON.
JSON to TypeScript Interface
Generate a basic TypeScript interface from sample JSON.
Markdown to HTML
Convert common markdown headings, lists, links, code, and paragraphs into HTML.
HTML to Markdown
Convert basic HTML tags into markdown.
HTML to Plain Text
Strip tags and return readable plain text.
Timestamp to Date
Convert Unix seconds or milliseconds to local and UTC dates.
Date to Timestamp
Convert a date/time string to Unix seconds and milliseconds.
px to rem Converter
Convert pixels to rem using an optional base font size.
rem to px Converter
Convert rem to pixels using an optional base font size.
HEX to RGB
Convert HEX colors to RGB values.
RGB to HEX
Convert RGB colors to HEX values.
HEX to HSL
Convert HEX colors to HSL values.
HSL to HEX
Convert HSL colors to HEX values.
SVG to JSX
Convert common SVG attributes to JSX-compatible attributes.
Base64 Encoder Decoder
Encode text to Base64 or decode Base64 back to readable text.
URL Encoder Decoder
Encode and decode URL strings safely.
HTML Entity Encoder Decoder
Encode or decode HTML entities.
Unicode Encoder Decoder
Convert text to Unicode escape sequences and back.
Binary Encoder Decoder
Convert text to binary and binary back to text.
Hex Encoder Decoder
Convert text to hex and hex back to text.
ASCII Converter
Convert text to ASCII codes and ASCII codes back to text.
JWT Decoder
Decode header, payload, expiry, and token metadata.
Slug Generator
Generate a URL-friendly slug from text.
QR Code Generator
Generate QR-ready text metadata from a URL or note.
JSON Path Finder
Explore JSON as a tree and copy dot, bracket, JSONPath, or lodash paths.
JSONPath Tester
Test simple JSONPath queries against pasted JSON.
XPath Tester
Run XPath selectors against pasted HTML or XML.
CSS Selector Tester
Test CSS selectors against pasted HTML and show matching elements.
URL Parser
Break URLs into parts, inspect query params, and remove tracking noise.
Query Parameter Parser
Parse a URL or query string into key-value pairs.
Query Parameter Builder
Build a query string from key-value pairs and an optional base URL.
File Path Cleaner
Normalize duplicate slashes and safe relative path parts.
Text Diff Checker
Compare text side by side with added, removed, and changed counts.
JSON Diff Checker
Compare JSON by path and export a readable diff report.
HTML Diff Checker
Compare two HTML snippets as text.
CSS Diff Checker
Compare two CSS snippets as text.
CSV Diff Checker
Compare two CSV inputs by line.
UUID Generator
Generate one or multiple UUID v4 values.
Random Password Generator
Generate a strong random password with simple options.
Random String Generator
Generate random strings with optional length and count.
Random Number Generator
Generate random numbers from min, max, and count options.
Hash Generator
Generate SHA hashes and an MD5 availability note from text.
Lorem Ipsum Generator
Generate placeholder words, sentences, or paragraphs.
Dummy JSON Generator
Generate sample JSON records for testing.
Color Palette Generator
Generate a simple color palette with HEX values.
CSS Gradient Generator
Generate CSS linear gradient code from two colors.
Box Shadow Generator
Generate CSS box-shadow code from simple values.
Border Radius Generator
Generate CSS border-radius code.
Meta Tag Generator
Generate title, description, keywords, and author meta tags.
Open Graph Generator
Generate Open Graph tags for title, description, image, and URL.
robots.txt Generator
Generate a basic robots.txt file.
sitemap.xml Generator
Generate a simple sitemap XML from a URL list.
Gitignore Generator
Generate .gitignore content for common stacks.
README Generator
Generate a clean README starter.
Cron Expression Generator
Generate cron expressions from common schedule options.
HTTP Status Code Lookup
Look up HTTP status codes with a simple explanation.
Header Parser
Parse HTTP headers into a readable key-value format.
User Agent Parser
Detect browser, OS, and device hints from a user agent string.
cURL to Fetch Converter
Convert simple cURL commands to JavaScript fetch code without executing requests.
cURL to Axios Converter
Convert simple cURL commands to Axios code without executing requests.
Fetch to cURL Converter
Convert simple fetch snippets to cURL where possible.
JSON Schema Generator
Infer a JSON Schema from sample data and export schema JSON.
JSON Schema Validator
Validate JSON against a pasted JSON schema with basic checks.
Word Counter
Count words, characters, sentences, paragraphs, and reading time.
Character Counter
Count characters with and without spaces.
Remove Duplicate Lines
Remove repeated lines while keeping the first occurrence.
Sort Lines Alphabetically
Sort lines A-Z or Z-A.
Remove Empty Lines
Remove blank lines from text.
Trim Spaces
Remove leading and trailing extra spaces from each line.
Find and Replace
Find text and replace it with another value.
Text Splitter
Split text by comma, line, space, or custom separator.
Text Joiner
Join lines or items using comma, space, newline, or custom separator.
Add Prefix/Suffix
Add a prefix and/or suffix to each line.
Remove Special Characters
Remove symbols or keep only letters, numbers, and spaces.
Extract Emails from Text
Extract email addresses from pasted text.
Extract URLs from Text
Pull links from pasted notes, pages, or messages.
Extract Numbers from Text
Extract numbers from pasted text.
CSV Viewer
Preview CSV as a clean text table.
CSV Formatter
Clean CSV spacing and line formatting.
CSV to Table
Convert CSV into a plain text table preview.
Table to CSV
Convert pasted table-like text into CSV.
CSV Column Extractor
Extract a selected CSV column by name or index.
CSV Duplicate Remover
Remove duplicate rows from CSV.
CSV Sorter
Sort CSV by a selected column.
JSON Table Viewer
Turn JSON arrays into searchable table-ready data.