Coding & Development
Owl Util
29d agoFree online tools for developers: JSON formatter, SQL editor, CSV editor, QR generator, token counter, PDF converter, AI chatbot, and more. No sign-up.
JSON FormatterURL EncoderCSV EditorToken CounterFree QR Code GeneratorText to PDF ConverterASCII Art GeneratorColor Blind TestTantraWheel SpinnerBrain TugText RepeaterIllusion LabStoic QuotesDate Difference CalculatorDarshanvaaniVMR EditorDSAVideo TrimJigsaw PuzzlesRand AnimalVideo and Image UpscalerColor ScreenSubtitle EditorWord CounterAI ChatbotPassport Photo CreatorCode VisualizerSQL MasterRegex ValidatorRainscapeCSV EditorVideo and Image Upscaler
Key Capabilities
01
JSON Formatter
Beautify, minify, and validate JSON data instantly with tree visualization.
02
URL Encoder
Encode and decode URLs and query parameters instantly.
03
CSV Editor
Edit, filter, sort, and transform CSV data with a spreadsheet-like interface.
04
Token Counter
Count tokens for LLM prompts and responses. Supports GPT, Claude, and more.
05
Free QR Code Generator
Generate QR codes for URLs, text, WiFi, or contact cards in seconds.
06
Text to PDF Converter
Convert text documents, markdown, or plain text to PDF instantly.
07
ASCII Art Generator
Generate creative ASCII art from text or images. Copy and share anywhere.
08
Color Blind Test
Take an interactive Ishihara-style color vision assessment right in your browser.
09
Tantra
Explore ancient tantric texts, symbols, and visualizations in a modern interface.
10
Wheel Spinner
Pick a random name or item from a custom list with a fun spinning wheel.
11
Brain Tug
Test your mental math skills against a computer opponent in this fast-paced tug of war game.
12
Text Repeater
Repeat any text multiple times instantly. Perfect for testing or having fun.
13
Illusion Lab
Create and explore fascinating optical illusions and visual tricks.
14
Stoic Quotes
Daily wisdom and profound quotes from ancient Stoic philosophers.
15
Date Difference Calculator
Instantly calculate the difference between two dates including total days, business days, and more.
16
Darshanvaani
A dedicated platform for guiding with philosophy.
17
VMR Editor
A powerful video watermark remover tool.
18
DSA
Learn and practice Data Structures and Algorithms.
19
Video Trim
Easily trim and cut your video files locally in your browser. Fast, secure, and private.
20
Jigsaw Puzzles
Play relaxing jigsaw puzzles with beautiful images right in your browser.
21
Rand Animal
Discover random animal instantly.
22
Video and Image Upscaler
Upscale your video and images seamlessly using AI.
23
Color Screen
Display a full-screen color of your choice for testing monitors or creating ambient light or fake update screen.
24
Subtitle Editor
Generate, edit, style, and export video subtitles privately in your browser.
25
Word Counter
Use our free word counter and word count checker to analyze keyword density and calculate reading time.
26
AI Chatbot
A free, private AI chatbot that runs entirely in your browser. No signup, no API key, no chat server — powered by Gemma 2B.
27
Passport Photo Creator
Create compliant passport photos for any country right in your browser. Crop, resize, and export to exact official specifications — privately.
28
Code Visualizer
Visualize, format, and share your code beautifully.
29
SQL Master
Write, test, and format SQL queries right in your browser. No setup required.
30
Regex Validator
Test, debug, and validate your regular expressions in real-time.
31
Rainscape
Immersive ambient rain sounds with procedurally generated audio and visual scenes.
32
CSV Editor
A spreadsheet-like interface for editing, filtering, sorting, and transforming CSV data.
33
Video and Image Upscaler
Upscale your video and images using AI.
Use Cases
JSON FormatterUse JSON formatter to beautify and minify JSON data instantly.Developers
URL EncoderUse URL encoder to encode and decode URLs and query parameters instantly.Designers
Free QR Code GeneratorUse QR code generator to generate QR codes for URLs, text, WiFi, or contact cards in seconds.Everyone
SQL MasterUse SQL editor to write, test, and format SQL queries right in your browser.Developers
Regex ValidatorUse regex validator to test, debug, and validate regular expressions in real-time.Developers
Text to PDF ConverterUse text to PDF converter to convert text documents, markdown, or plain text to PDF instantly.Everyone
AI ChatbotUse AI chatbot to have a free, private AI chatbot conversation in your browser.Developers
Passport Photo CreatorUse passport photo creator to create compliant passport photos for any country right in your browser.Everyone
Update History
Updated 29d ago▲ 0% mentionsProduct HuntWeb