Welcome to Dev Tools
Select a tool from the sidebar to get started. Each utility is designed for performance and privacy, running entirely in your browser.
All Tools
28 toolsCompare 2 text files
Upload or paste two texts to see a side-by-side diff with line numbers.
String Case Converter
Translate text between camelCase, PascalCase, kebab-case, and snake_case instantly.
Slugify String
Turn titles or labels into clean slugs with custom delimiters.
Cron Expression Validator
Validate cron syntax, preview the next 10 fire times, and spot risky schedules.
Chmod Calculator
Toggle owner/group/other permissions and copy the matching chmod notation.
CSV Data Profiler
Inspect CSV headers, nulls, unique values, and patterns with exportable results.
CSV ↔ JSON Converter
Convert CSV rows to JSON arrays and back with header-aware parsing.
YAML ↔ JSON Converter
Translate YAML configs into JSON and back with a single click.
JSON ↔ TOON Converter
Round-trip JSON into TOON outline notation with a single click and keep prompts token-lean.
Timestamp to Date Converter
Turn Unix timestamps into readable dates in seconds or milliseconds.
Datetime Difference Calculator
Compare two date-times and see the gap in seconds, minutes, hours, days, months, and years.
JWT Decoder
Inspect JWT headers and payloads without validating signatures.
UUID Generator
Create random UUIDs for testing, database keys, or identifiers.
Lorem Ipsum Generator
Create placeholder sentences or paragraphs with adjustable lengths.
Password Generator & Strength Checker
Create random passwords with custom character sets and see entropy-based strength.
SVG Placeholder Generator
Create on-the-fly SVG placeholders with custom text, colors, and dimensions.
QR Code Generator
Create shareable QR codes for URLs, text, or WiFi credentials in seconds.
Word Cloud Generator
Visualize text frequency with adjustable colors, stopwords, and dimensions.
Regex Tester
Validate regex patterns, flags, and see live matches against sample text.
Message Digester
Generate cryptographic hashes from text or uploaded files with multiple algorithms.
JSON Formatter
Instantly pretty-print and validate JSON for APIs, configs, or log payloads.
XML Formatter
Beautify XML with consistent indentation and readable markup.
SQL Formatter
Clean up ad-hoc queries for MySQL, Postgres, SQL Server, and more.
URL & Base64 Encoder/Decoder
Encode and decode URLs and Base64 strings for tokens, cookies, and payloads.
Timezone Converter
Translate meeting times across regions with clear offsets and readable formats.
Bitwise Calculator
Evaluate AND/OR/XOR/shift operations and view binary representations.
WebP Converter
Batch convert images to WebP, see total savings, and export everything in one click.
Photo EXIF & Metadata Editor
Upload a photo to inspect and rewrite EXIF fields, timestamps, and GPS tags.