Dokdoin - Convenient & Safe Web Tools

Check suspicious short links in advance. Prevent malicious app installation and phishing scams.

Test your website on various device resolutions and frames like smartphones and tablets, similar to Chrome DevTools.

Explore over 3,000 global standard emojis by category and copy them easily with one click.

Combine and copy trendy text emoticons (Kaomoji) and various special symbols like stars and hearts.

Instantly convert English text into aesthetic fonts (cursive, gothic, double-struck) for your Instagram profile or posts.

Saves instantly to your browser with real-time character counting and customizable text formatting.

Create high-quality QR codes with your own logo and gradient colors by simply entering a URL.

Batch convert large amounts of images to high-efficiency WebP/AVIF losslessly to optimize file size.

Calculate average unit price by entering multiple buy prices and amounts, and generate a link to share your plan.

Real-time calculation of four common percentage types: ratios, increase/decrease rates, stock returns, and discount rates.

Instantly perform two-way conversions for essential everyday units like real estate area, clothing sizes, temperature, and weight.

Smartly extract URLs from text and open multiple links at once or sequentially in order.

Compare two text snippets line-by-line to highlight additions, deletions, and differences.

Calculate real-time character count (with/without spaces), words, lines, and byte sizes for your essays.

Cleanly remove unnecessary spaces, tabs, and line breaks from text.

Convert English text between UPPERCASE, lowercase, and Capitalized words instantly.

Easily combine multiple PDF files into a single document in your desired order.

Extract specific pages from a PDF file or split it into multiple files.

Convert each page of a PDF document into high-quality JPG images for easy download.

Reduce image file sizes while minimizing quality loss and adjust compression levels in real-time.

Adjust the width and height pixels or percentages of your image with aspect ratio lock options.

Quickly convert image files between JPG, PNG, and WebP formats locally on your browser.

Automatically remove the background color of an image with a single click.

Protect your copyright by inserting multiple text watermarks on your images.

Type text over PDFs and draw signatures with your mouse or touch, then export without any installation.

Edit or completely remove metadata properties like author, company, and creator tools hidden inside PDF and Office files.

Edit or batch remove EXIF metadata such as camera model, date taken, and GPS locations hidden in your JPEG photos.

Rename multiple files using rules, add sequential numbers, and automatically fix Mac/Windows Korean character encoding issues.

Instantly check your public IP address and location, test ping speed, and diagnose browser privacy leaks.

Track the exact geographical location and ISP information by entering any IPv4 or IPv6 address.

Measure and analyze Ping RTT latency, Jitter, and packet loss between your browser and servers in real-time.

Scan your device's unique privacy identifiers, WebRTC IP leaks, and canvas fingerprinting hashes exposed by your browser.

Diagnose whether your IP address is blacklisted on global spam blocking networks (DNSBL) like Spamhaus and Barracuda.

Set a target average price to calculate how many more shares you need to buy and visualize investment weights with graphs.

Enter monthly savings and interest rate to see the post-tax maturity amount, and compare simple vs. compound interest growth via charts.

View your monthly dividend calendar and calculate post-tax payouts, including tax-bracket warnings.

Calculate monthly loan payments based on interest and repayment type, and generate an easily copyable Excel amortization schedule.

Enter a YouTube URL to download thumbnails and extract the video's title, tags (keywords), and description with one click.

Upload your bookmarks to automatically categorize them by domain and visualize them as beautiful app icon tiles. Create your own start screen without complex organization.

Scan and remove duplicate or dead (404 error) bookmark links easily.

Instantly process and encode Final Cut Pro XML subtitle data into SRT, VTT, and plain text formats.