Tools
All tools
Search local-first browser tools by category.
Search tools
56 browser tools
Text tools
6
Word and Character Counter
Count words, characters, lines, and UTF-8 bytes without uploading text.
Add to favorites: Word and Character Counter
Text Case Converter
Convert text between uppercase, lowercase, title case, camelCase, and snake_case in your browser.
Add to favorites: Text Case Converter
Text Cleaner and Line Tools
Clean lists and text locally: remove duplicate lines, trim whitespace, sort lines, remove blank lines, and normalize spaces.
Add to favorites: Text Cleaner and Line Tools
Multilingual Spell Checker and Typo Finder
Find common typos, repeated words, punctuation issues, and local dictionary misses in your browser.
Add to favorites: Multilingual Spell Checker and Typo Finder
Instagram Line Breaker
Format Instagram captions, bios, and comments locally so blank lines are preserved when you copy and paste.
Add to favorites: Instagram Line Breaker
Korean-English Typing Converter
Convert text typed with the wrong Korean or English keyboard layout in your browser.
Add to favorites: Korean-English Typing Converter
Developer tools
25
JSON Formatter
Format, validate, and compact JSON directly in your browser.
Add to favorites: JSON Formatter
URL Encoder and Decoder
Encode and decode URLs safely using browser APIs.
Add to favorites: URL Encoder and Decoder
Base64 Encoder and Decoder
Convert text and files to or from Base64 locally.
Add to favorites: Base64 Encoder and Decoder
UUID and Random String Generator
Generate UUIDs and random strings for development workflows.
Add to favorites: UUID and Random String Generator
Password and Token Generator
Generate strong passwords, passphrases, and random tokens locally with Web Crypto. Nothing is sent to a server.
Add to favorites: Password and Token Generator
Hash and Checksum Generator
Calculate SHA checksums for text or local files in your browser and compare expected hashes without uploading data.
Add to favorites: Hash and Checksum Generator
HTML Entity Encoder and Decoder
Escape and unescape HTML entities locally for snippets, templates, and CMS content.
Add to favorites: HTML Entity Encoder and Decoder
QR Code Generator
Create QR codes for URLs, text, Wi-Fi, and contact details in your browser.
Add to favorites: QR Code Generator
Color Converter and Palette Generator
Convert CSS colors, check contrast, and generate palettes in your browser.
Add to favorites: Color Converter and Palette Generator
CSV JSON Converter and Table Cleaner
Convert CSV, TSV, and JSON locally with table preview and safe export.
Add to favorites: CSV JSON Converter and Table Cleaner
Unix Timestamp Converter and Time Zone Planner
Convert Unix timestamps, dates, and time zones locally in your browser.
Add to favorites: Unix Timestamp Converter and Time Zone Planner
JWT Decoder and Claims Inspector
Decode JWT header and payload locally with claim timeline and diagnostics.
Add to favorites: JWT Decoder and Claims Inspector
Text Diff Checker and Patch Viewer
Compare text locally with side-by-side diff, summary, and patch output.
Add to favorites: Text Diff Checker and Patch Viewer
Markdown Preview Editor and HTML Exporter
Write Markdown locally with live preview, sanitized HTML, copy, and downloads.
Add to favorites: Markdown Preview Editor and HTML Exporter
Code Formatter and JavaScript Minifier
Format code locally and minify JavaScript without uploading or running it.
Add to favorites: Code Formatter and JavaScript Minifier
ASCII and Unicode Character Table
Look up ASCII codes, Unicode code points, and copyable symbols locally.
Add to favorites: ASCII and Unicode Character Table
JavaScript Regex Tester and Replace Preview
Test JavaScript regex matches, capture groups, and replacements locally.
Add to favorites: JavaScript Regex Tester and Replace Preview
URL Parser and Query Inspector
Parse URLs into protocol, host, path, query parameters, and hash, then rebuild query strings locally.
Add to favorites: URL Parser and Query Inspector
Mermaid Viewer and Editor
Preview Mermaid diagrams locally, inspect syntax errors, switch themes, and export Mermaid diagrams as SVG or PNG in your browser.
Add to favorites: Mermaid Viewer and Editor
Cron Expression Parser
Parse five-field Unix cron expressions, explain schedules, and preview upcoming runs with timezone-aware display.
Add to favorites: Cron Expression Parser
Cron Expression Generator
Build standard five-field Unix cron expressions with presets, validation, explanations, and timezone-aware next-run previews.
Add to favorites: Cron Expression Generator
YAML JSON TOML XML Converter
Convert JSON, YAML, TOML, and XML locally with formatting controls and warnings for lossy XML mapping.
Add to favorites: YAML JSON TOML XML Converter
JSONPath Tester
Evaluate JSONPath queries against local JSON and inspect matched values, paths, and capped result arrays.
Add to favorites: JSONPath Tester
JSON to TypeScript
Generate TypeScript interfaces or type aliases from sample JSON locally with warnings for nullable fields, arrays, and mixed shapes.
Add to favorites: JSON to TypeScript
Meta Tag Previewer and Generator
Build title, description, Open Graph, and Twitter card tags locally with live SERP and social previews.
Add to favorites: Meta Tag Previewer and Generator
Image tools
8
Image Compressor
Compress images locally and prepare lighter files for the web.
Add to favorites: Image Compressor
Image Resizer
Resize images in the browser while keeping files private.
Add to favorites: Image Resizer
Favicon Generator
Create favicon PNG assets and copy HTML link tags locally from one image.
Add to favorites: Favicon Generator
Image Format Converter
Convert PNG, JPG, and WebP images locally with quality and background controls.
Add to favorites: Image Format Converter
Image Crop and Rotate Tool
Crop, rotate, flip, and export images locally without uploading photos.
Add to favorites: Image Crop and Rotate Tool
EXIF Metadata Viewer and Stripper
View photo EXIF metadata and remove embedded details locally before sharing images.
Add to favorites: EXIF Metadata Viewer and Stripper
Image Splitter
Split an image into rows and columns locally, preview numbered tiles, and download pieces for Instagram grids, carousels, or design layouts.
Add to favorites: Image Splitter
AI Image Detector
Inspect image metadata, content credentials, and visible artifact signals locally to understand AI-generation and provenance clues without a definitive verdict.
Add to favorites: AI Image Detector
Random tools
12
Random Wheel Picker
Spin a wheel to pick names, teams, or choices with instant feedback.
Add to favorites: Random Wheel Picker
Ladder Game
Create a ladder draw for teams, prizes, or quick decisions.
Add to favorites: Ladder Game
Lotto Number Generator
Generate random lottery-style number sets in the browser.
Add to favorites: Lotto Number Generator
Random Number Picker
Pick random numbers from any range locally, with unique draws, exclusions, sorting, and copyable results.
Add to favorites: Random Number Picker
Dice Roller
Roll virtual dice for tabletop games, classrooms, and quick decisions with local random results.
Add to favorites: Dice Roller
Coin Flipper
Flip one or many virtual coins for heads-or-tails decisions in your browser.
Add to favorites: Coin Flipper
Random Card Picker
Shuffle a virtual deck and draw random playing cards locally, with optional jokers.
Add to favorites: Random Card Picker
Team Generator
Create random teams or groups from a list of names locally, with copyable results and uneven group handling.
Add to favorites: Team Generator
Random Date Generator
Generate random dates and times within a range for tests, prompts, schedules, and games.
Add to favorites: Random Date Generator
Bingo Caller
Run a browser-based bingo caller and generate simple bingo cards for classrooms or events.
Add to favorites: Bingo Caller
Magic 8 Ball
Ask a yes-or-no question and get a playful Magic 8 Ball style answer instantly.
Add to favorites: Magic 8 Ball
Board Game Spinner
Use a virtual spinner for board games, classrooms, and quick random moves.
Add to favorites: Board Game Spinner
Network tools
3
User Agent Parser
Inspect user agent strings and identify browser, OS, engine, bot, and device-class clues without sending logs to a server.
Add to favorites: User Agent Parser
Browser Info Checker
Check your browser, user agent, screen size, language, timezone, cookies, storage, and network hints locally.
Add to favorites: Browser Info Checker
IP CIDR Calculator
Calculate IPv4 and IPv6 CIDR network ranges, masks, wildcard masks, usable hosts, contains checks, and subnet splits locally.
Add to favorites: IP CIDR Calculator
Extraction tools
2
YouTube Thumbnail Extractor
Extract YouTube video and Shorts thumbnail URLs locally, preview available quality levels, and copy direct image, Markdown, or HTML snippets.
Add to favorites: YouTube Thumbnail Extractor
HTML Resource Extractor
Paste HTML source or upload an HTML file to extract images, links, scripts, stylesheets, icons, media, and resource hints locally.
Add to favorites: HTML Resource Extractor
