Utilitoo
Online tools for everyone
Free online tools for developers, writers, and everyday tasks - JSON formatters, calculators, text utilities, and more. Fast, private, no signup required.
Utilitoo is a collection of free, browser-based utilities for developers, writers, students, and anyone who needs quick answers without installing software or creating an account. From JSON formatters and JWT decoders to PDF tools, calculators, and text utilities, everything runs in one place so you can get work done faster.
Privacy is built in: most tools process your input entirely on your device. Text, files, and data you paste into a tool are not uploaded to our servers for processing. That makes Utilitoo a practical choice for API payloads, config files, documents, and everyday calculations where you do not want your data leaving your browser.
Browse by category - Developer, Text, Security, Calculators, Time, PDF, and Home & Garden - or search for a specific tool. New utilities are added regularly. The site is free to use with optional Pro features planned for the future.
Beyond the widgets, we publish short guides on the Blog and share how the project is built on About. Prefer a category overview first? Browse the sections below, then open any tool for instructions, use cases, and FAQs.
Categories
PDF Tools
Merge, split, convert, and edit PDFs in your browser
Developer Tools
JSON, encoding, regex, and dev utilities
Time Tools
Timezones, timers, and date calculators
Calculators
Financial, math, and everyday calculators
Text Tools
Word count, case conversion, and text utilities
Security Tools
Passwords, hashing, and encryption utilities
Home & Garden Tools
Decor colors, garden planning, and home project helpers
Available now (120 tools)
JSON Formatter
Format and beautify JSON online instantly.
JSON Validator
Validate JSON syntax and find errors instantly.
JSON Viewer
Browse JSON in an interactive tree view.
JSON Schema Validator
Validate JSON data against a JSON Schema.
JSON Minifier
Minify JSON by removing whitespace.
Base64 Encode / Decode
Encode and decode Base64 strings instantly.
JWT Decoder
Decode JWT tokens and inspect claims.
UUID Generator
Generate random UUID v4 identifiers.
URL Encoder / Decoder
Encode and decode URL strings and query parameters.
HTML Escape / Unescape
Escape or unescape HTML entities.
SQL Formatter
Format and beautify SQL queries.
YAML Formatter
Format and validate YAML configuration files.
Markdown Viewer
Preview Markdown as formatted HTML in real time.
Mermaid Editor
Edit Mermaid diagrams with live preview and export SVG or PNG.
CSV Viewer
View and inspect CSV data in a table.
JSON to CSV
Convert JSON arrays into CSV files.
JSON Compare
Compare two JSON documents side by side.
JSON to XML
Convert JSON data to XML format.
XML to JSON
Convert XML documents to JSON format.
CSV to JSON
Convert CSV data into JSON arrays.
JSON to YAML
Convert JSON documents into YAML format.
YAML to JSON
Convert YAML documents into JSON format.
Markdown to HTML
Convert Markdown source into HTML output.
HTML to Markdown
Convert HTML snippets into Markdown text.
XML Formatter
Format and beautify XML documents.
TOML Formatter
Format and normalize TOML configuration files.
TOML to JSON
Convert TOML configuration into JSON format.
Number Base Converter
Convert numbers between binary, octal, decimal, and hex.
Text to Binary
Convert text to binary and binary back to text.
HTTP Status Codes
Searchable reference for common HTTP status codes.
MIME Type Lookup
Look up MIME types by extension or media type.
Certificate Decoder
Decode PEM X.509 certificates and inspect details.
Regex Tester
Test regular expressions against sample text.
Diff Checker
Compare two texts and highlight differences.
Cron Expression Parser
Parse cron expressions into human-readable schedules.
Timestamp Converter
Convert Unix timestamps to dates and back.
IP Lookup
Look up IP address information.
CIDR Calculator
Calculate network details from CIDR notation.
Subnet Calculator
Calculate subnet details and split networks.
DNS Lookup
Look up DNS records for any domain.
HTTP Header Viewer
View HTTP response headers for any URL.
User Agent Parser
Parse browser user agent strings.
Color Converter
Convert colors between HEX, RGB, and HSL.
Image Color Picker
Pick colors from any image with an online eyedropper.
Color Name from Photo
Find a human-friendly color name from any photo you upload.
Garden Spacing Calculator
Calculate how many plants fit in a garden bed by spacing.
Mulch Coverage Calculator
Estimate mulch volume and bag count for beds and landscaping.
Raised Bed Calculator
Calculate soil volume and lumber for a raised garden bed.
Current Time in City
See current local time in any city.
Timezone Converter
Convert times between timezones.
World Clock
View multiple city times at once.
Meeting Planner
Find overlapping business hours across timezones.
Countdown Timer
Set a countdown to any date and time.
Stopwatch
Online stopwatch with lap times.
Date Difference Calculator
Calculate days between two dates.
Unix Time Converter
Convert between Unix epoch and dates.
Business Hours Checker
Check if a business is open now.
Age Calculator
Calculate exact age from birth date.
Percentage Calculator
Calculate percentages, increases, and decreases.
BMI Calculator
Calculate Body Mass Index.
Loan Calculator
Calculate monthly loan payments.
Mortgage Calculator
Calculate mortgage payments and interest.
Compound Interest Calculator
Calculate compound interest growth.
Discount Calculator
Calculate sale prices after discounts.
Tip Calculator
Calculate tips and split bills.
Salary Calculator
Convert between hourly, monthly, and annual salary.
Tax Calculator
Estimate income tax amounts.
Inflation Calculator
Calculate purchasing power over time.
Age in Days
Calculate total days lived.
Fuel Cost Calculator
Calculate trip fuel costs.
Calorie Calculator
Estimate daily calorie needs.
GPA Calculator
Calculate grade point average.
Speed Calculator
Calculate speed, distance, or time.
Area Calculator
Calculate area of common shapes.
Volume Calculator
Calculate volume of 3D shapes.
Time Duration Calculator
Calculate duration between two times.
Profit Margin Calculator
Calculate profit margins and markup.
Retirement Calculator
Project retirement savings growth.
APR Calculator
Calculate the true annual percentage rate including fees.
Savings Calculator
Project savings growth with regular contributions.
ROI Calculator
Calculate return on investment and annualized ROI.
Word Counter
Count words, characters, sentences, and paragraphs.
Character Counter
Count characters with and without spaces.
Sentence Counter
Count sentences in your text.
Reading Time Calculator
Estimate how long it takes to read your text.
Case Converter
Convert text between upper, lower, and title case.
Remove Duplicate Lines
Remove duplicate lines from text.
Remove Extra Spaces
Trim and normalize whitespace in text.
Text Sorter
Sort lines of text alphabetically.
Slug Generator
Generate URL-friendly slugs from text.
QR Code Generator
Create QR codes for URLs, text, WiFi, email, and phone numbers.
Barcode Generator
Generate CODE128, EAN-13, UPC, and other barcodes online.
Reverse Text
Reverse text character by character.
Random Text Generator
Generate random text strings.
Lorem Ipsum Generator
Generate placeholder Lorem Ipsum text.
Text Compare
Compare two text blocks side by side.
Find & Replace Tool
Find and replace text with regex support.
Extract Emails
Extract email addresses from text.
Extract URLs
Extract URLs and links from text.
Password Generator
Generate strong random passwords.
Password Strength Checker
Check how strong your password is.
SHA256 Generator
Generate SHA-256 hashes from text.
MD5 Generator
Generate MD5 hashes from text.
AES Encrypt / Decrypt
Encrypt and decrypt text with AES.
RSA Encrypt / Decrypt
RSA public/private key encryption.
Hash Checker
Verify text against a known hash.
HMAC Generator
Generate HMAC signatures from text and a secret key.
Bcrypt Generator
Generate bcrypt password hashes with adjustable cost.
Secure Random Generator
Generate cryptographically secure random values.
Token Generator
Generate secure API tokens and secrets.
Data Obfuscator
Obfuscate sensitive data for demos.
Merge PDF
Combine multiple PDF files into one document.
Split PDF
Extract pages or split a PDF into separate files.
Delete PDF Pages
Remove unwanted pages from a PDF.
Reorder PDF Pages
Drag and drop to rearrange PDF pages.
Rotate PDF Pages
Rotate PDF pages 90° at a time.
Images to PDF
Convert PNG and JPEG images into a PDF.
PDF to Images
Export PDF pages as PNG or JPEG images.
Extract PDF Text
Copy embedded text from PDF documents.
PDF Watermark
Add a text watermark to every PDF page.