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15+ free, instant utility tools — QR codes, passwords, calculators, converters, and more. All data stays on your device.

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About Penguin Tools — Free Online Utility Tools

Penguin Tools is a collection of 15+ free, browser-based utility tools that run entirely on your device. Whether you need a QR code generator, a secure password generator, an EMI calculator, or a word counter, you can do it all without creating an account or uploading anything to a server.

All tools are 100% private. Processing happens locally in your browser using modern Web APIs. No cookies track your usage, no analytics on your inputs, no data retention whatsoever.

Why Choose Penguin Tools?

  • No Signup Required — Open a tool and start immediately.
  • Privacy First — Your data never leaves your browser.
  • Completely Free — Every tool, every feature, forever free.
  • Mobile-Friendly — Optimised for phones, tablets, and desktops.

All Available Tools

QR Code Generator · Password Generator · EMI Calculator · Image to PDF · PDF to Word · Word Counter · Unit Converter · Base64 Encoder & Decoder · Color Picker · JSON Formatter · Age Calculator · Tip Calculator · Text Case Converter · URL Encoder & Decoder · Percentage Calculator · Stopwatch & Timer

Home›Image to PDF

🖼 Image to PDF Converter

Convert one or multiple images into a single PDF document, instantly in your browser.

Convert Images to PDF

📁

Click to upload images or drag & drop

JPEG, PNG, WebP · Multiple files supported

About Image to PDF Converter

Convert your photos, screenshots, and scanned images into a professional PDF document with Penguin Tools' Image to PDF converter. Select multiple images and combine them into a single, well-formatted PDF in seconds — no watermarks, no server uploads, no account required.

Key Features

  • Supports JPEG, PNG, and WebP image formats
  • Combine multiple images into one PDF document
  • Choose between A4, Letter, or fit-to-image page sizes
  • Zero watermarks, no limits, no account required
  • 100% browser-based — your images never leave your device

Frequently Asked Questions

How many images can I convert at once?
You can select as many images as you like. Each image becomes its own PDF page.
Is the PDF searchable?
Since the input is images, the output PDF will contain image pages only. Use an OCR tool for text-searchable PDFs.
Are my images sent to a server?
Absolutely not. All processing happens entirely in your browser. No data ever leaves your device.
Home›PDF to Word

📄 PDF to Word Converter

Extract text content from PDF files and export as editable plain text or Word-compatible format.

Convert PDF to Text / Word

📄

Click to upload your PDF

PDF files only · Max 10MB

📝
Need full PDF→Word with formatting? Adobe Acrobat Pro offers advanced conversion with layout preservation. [Affiliate placeholder]

How PDF to Word Conversion Works

PDFs are designed for consistent viewing across all devices, but editing them is tricky. Penguin Tools extracts all text content from your PDF using browser-based parsing — no server required. Download as a .txt file or copy directly to your clipboard.

FAQs

Can it convert scanned PDFs?
Scanned PDFs are images embedded in a PDF. This tool extracts text from text-based PDFs only. Scanned PDFs require OCR (Optical Character Recognition).
Is my PDF data safe?
Yes. All processing happens in your browser. Your PDF is never sent to our servers.
Home›QR Code Generator

📱 QR Code Generator

Generate custom QR codes for URLs, text, contacts, Wi-Fi and more — free and instant.

Generate a QR Code

Type something above to generate a QR code…

What is a QR Code?

QR (Quick Response) codes are two-dimensional barcodes that store information — URLs, text, phone numbers, Wi-Fi credentials, and more. Our QR Code Generator creates high-quality, color-customizable QR codes directly in your browser with zero server involvement.

Common Uses for QR Codes

  • Restaurant menus — link to digital menu
  • Business cards — link to your LinkedIn or portfolio
  • Event posters — link to registration pages
  • Payments — link to UPI, PayPal portals
  • Wi-Fi sharing — encode SSID and password

FAQs

How long does a QR code last?
Static QR codes never expire. They work as long as the linked URL or content is accessible.
What's the maximum data a QR code can hold?
Up to ~3,000 alphanumeric characters, but shorter content produces simpler, more scannable codes.
Home›Password Generator

🔐 Password Generator

Generate strong, random, cryptographically secure passwords instantly.

Generate a Secure Password

🔒 Passwords are generated locally using Web Crypto API and never stored or transmitted.

Why Use a Password Generator?

Penguin Tools' Password Generator uses the Web Cryptography API — the same cryptographic standard used by banks and security applications — to generate truly random passwords. No patterns, no predictability, no server involvement.

What Makes a Strong Password?

  • At least 12–16 characters long
  • Mix of uppercase and lowercase letters
  • Includes numbers and special symbols
  • Unique for every account (never reuse)

FAQs

Is this password generator truly random?
Yes. We use the browser's Web Cryptography API (crypto.getRandomValues) which generates cryptographically secure random values — far more random than Math.random().
How long should my password be?
16 characters is the recommended minimum. For high-value accounts (banking, email), use 20+ characters with all character types.
Home›Word Counter

📝 Word Counter

Count words, characters, sentences, paragraphs, and reading time instantly.

Paste or Type Your Text

0
Words
0
Characters
0
No Spaces
0
Sentences
0
Paragraphs
0 min
Reading Time

About Word Counter

A word counter is essential for writers, students, bloggers, and content marketers. Instantly get word count, character count, sentence count, paragraph count, and estimated reading time as you type.

FAQs

How is reading time calculated?
Reading time is calculated at an average reading speed of 225 words per minute.
Does the tool save my text?
No. All analysis happens in your browser. Nothing is stored or sent anywhere.
Home›Age Calculator

🎂 Age Calculator

Calculate your exact age in years, months, days, hours — plus days until your next birthday.

Calculate Your Age

About the Age Calculator

More than a simple age finder — get a complete breakdown in years, months, days, and hours. Also shows which day of the week you were born and how many days remain until your next birthday.

FAQs

Can I calculate age for any past date?
Yes! Use the "Calculate As Of" field to find age at any point in time, not just today.
Home›EMI Calculator

💰 EMI Calculator

Calculate your monthly loan EMI, total interest, and full amortization schedule.

Calculate Loan EMI

About EMI Calculator

EMI (Equated Monthly Installment) is the fixed payment amount you make each month to repay a loan. Our calculator computes your exact EMI using the standard reducing balance formula, shows total interest payable, and generates a full amortization table.

FAQs

What is the EMI formula?
EMI = P × r × (1+r)^n / ((1+r)^n - 1), where P is principal, r is monthly interest rate, and n is number of months.
Is this accurate for all loan types?
This calculator uses the standard reducing balance method, which is used by most banks for home loans, personal loans, and car loans in India.
Home›Unit Converter

🔄 Unit Converter

Convert between length, weight, temperature, area, volume, speed and more.

Convert Units

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About the Unit Converter

Penguin Tools' Unit Converter supports 7 categories and dozens of units. From metric to imperial, Celsius to Fahrenheit, kilobytes to gigabytes — all conversions happen instantly in your browser.

FAQs

How accurate are the conversions?
All conversion factors are based on internationally accepted definitions. Results are accurate up to 10 significant digits.
Can I convert temperature from Celsius to Fahrenheit?
Yes! Click the "Temp" tab, enter your value, and select your from/to units. Kelvin is also supported.
Home›Tip Calculator

🍽️ Tip Calculator

Calculate tip amount, split bills among friends, and find per-person totals instantly.

Calculate Your Tip & Split

About Tip Calculator

Never struggle with restaurant math again. Enter your bill, choose a tip percentage, and split it however many ways you need. Great for dining out, delivery orders, and any service where you want to calculate gratuity quickly.

FAQs

What is a standard tip percentage?
In restaurants, 15–20% is standard. 10% is considered modest; 20–25% is generous. For delivery, 10–15% is common in India.
Home›Base64 Encoder / Decoder

🔢 Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 strings back to plain text — instantly.

Encode or Decode Base64

What is Base64?

Base64 is an encoding scheme that converts binary data into ASCII characters, making it safe to transmit over text-based channels. It's widely used in email attachments, data URLs, API tokens, and JWT tokens.

Common Uses

  • Encoding binary data for JSON APIs
  • Embedding images as data URLs in HTML/CSS
  • Encoding JWT tokens and authentication headers
  • Storing binary data in text-only systems

FAQs

Is Base64 the same as encryption?
No. Base64 is encoding, not encryption. It's trivially reversible and provides no security. Use it for data format conversion, not protection.
Why does Base64 output end with = signs?
The = signs are padding characters. Base64 encodes 3 bytes at a time; if the input isn't divisible by 3, it pads with = to fill the last group.
Home›Text Case Converter

🔡 Text Case Converter

Convert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and more.

Convert Text Case

About Text Case Converter

Instantly convert any text to the case format you need. Perfect for developers (camelCase, snake_case, kebab-case), writers (Title Case, Sentence case), and data processing (UPPERCASE, lowercase).

FAQs

What is Title Case vs Sentence case?
Title Case capitalizes the first letter of every word (like a book title). Sentence case only capitalizes the first word of each sentence, like normal writing.
Home›URL Encoder / Decoder

🔗 URL Encoder / Decoder

Encode special characters for safe URL usage or decode URL-encoded strings back to plain text.

Encode or Decode URLs

About URL Encoder / Decoder

URLs can only contain certain ASCII characters. Special characters like spaces, &, ?, # must be percent-encoded (%20, %26, etc.) for safe use in URLs. Our tool handles encoding and decoding instantly.

FAQs

What's the difference between encodeURI and encodeURIComponent?
encodeURI encodes a full URL (leaves :, /, ?, # intact). encodeURIComponent encodes everything including those characters — use it for query parameter values.
Home›Random Number Generator

🎲 Random Number Generator

Generate truly random numbers, dice rolls, coin flips, and random lists.

Generate Random Numbers

Quick Tools

About Random Number Generator

Generate cryptographically random numbers using the browser's Web Crypto API. Perfect for games, statistics, raffle draws, picking a random winner, or any situation requiring unbiased random selection.

FAQs

Is this truly random?
Yes! We use window.crypto.getRandomValues() which generates cryptographically secure random values from hardware entropy. Far more random than Math.random().
Home›Color Picker

🎨 Color Picker & Converter

Pick colors and convert between HEX, RGB, HSL, and HSB formats instantly.

Pick a Color

Palette Variations

About Color Picker

Pick any color using the color wheel and instantly get its HEX, RGB, and HSL values. Great for web designers, developers, and anyone working with colors. The palette variations help you find tints, shades, and complementary colors.

FAQs

What is the difference between HEX and RGB?
HEX is a 6-character hexadecimal representation (e.g., #ff4f00). RGB uses three decimal values for red, green, and blue channels (e.g., rgb(255, 79, 0)). Both represent the same colors — HEX is more common in web design.
Home›JSON Formatter

📋 JSON Formatter & Validator

Format, beautify, minify, and validate JSON data instantly in your browser.

Format / Validate JSON

About JSON Formatter

JSON (JavaScript Object Notation) is the standard data interchange format for web APIs. Our formatter beautifies raw JSON with proper indentation, minifies it for production, and validates it for syntax errors — all instantly in your browser.

FAQs

What's the difference between Beautify and Minify?
Beautify adds proper indentation and line breaks to make JSON human-readable. Minify removes all whitespace to reduce file size for production use.
Is my JSON data saved?
Never. All processing is done in your browser. Your JSON data is never transmitted to any server.
Home›Percentage Calculator

% Percentage Calculator

Calculate percentages, percentage change, and find what percent one number is of another.

Percentage Calculations

What is X% of Y?
X is what percent of Y?
Percentage change from X to Y

About Percentage Calculator

Calculate any type of percentage instantly — find X% of a number, determine what percent one value is of another, or calculate the percentage increase or decrease between two values. Perfect for discounts, grades, taxes, growth rates, and more.

Home›Stopwatch & Timer

⏱ Stopwatch & Countdown Timer

A precise stopwatch with lap tracking and a countdown timer with alarm.

Stopwatch

00:00.000

Countdown Timer

05:00