UD5 Toolkit
Musical Interval Identifier – Ear Training & Theory Tool
Select two notes to instantly name the musical interval between them. Displays semitone count and common enharmonic spellings. Essential for music theory students.
Tag: Tool Hub | Discover Free Online Calculators & Utilities
15+ toolsSolarize Image Effect – Retro Darkroom Look Online
Apply a solarization (Sabattier) effect to any image, inverting tones above a threshold for a surreal, metallic retro look. No downloads needed.
CSS Specificity Battle – Compare Two Selectors Side by Side
Enter two CSS selectors and see which one wins in a specificity battle. Displays the (a,b,c) score and explains why one overrides the other.
Font Mood Matcher – Find Fonts by Emotion & Style
Choose a mood (elegant, playful, modern, classic) and see a curated list of free Google Fonts that match. Copy the @import code for immediate use.
CSV Column Filter & Sort – Explore Large Files in Browser
Open a CSV file and interactively filter rows by column values or sort by any column. All processing stays local for fast, private data exploration.
Contextual Spell Checker – Commonly Confused Words
Paste your text to highlight commonly confused words (their/there, affect/effect) with usage explanations. A second set of eyes for editing important emails.
Email Subject Line Tester – Preview & Length Check
Type your email subject line and see how it will appear on mobile and desktop inboxes. Checks character limits and flags spammy words for better open rates.
CSS Obfuscator – Minify & Mangle Class Names
Obfuscate CSS by mangling class names and removing whitespace for production. Use with caution and export a mapping file to keep references intact.
Music License Tag Builder – Give Credit in Video Descriptions
Select a royalty‑free track source and fill in details to generate a properly formatted license attribution text for your YouTube or Vimeo description.
Grid Overlay Tester – Overlay Custom Grids on Live Sites
Enter a URL and apply a custom CSS grid overlay to check alignment. A quick frontend design tool for verifying column placement and baseline grids.
Cookie String Parser & Editor – Read document.cookie
Parse a raw cookie string into a readable table. Edit values or create new cookies, then get the properly formatted string to set via JavaScript.
Emoji Search Engine – Find Emojis by Meaning or Word
Search for emojis by describing how they look or what they mean. Results are ranked by relevance, and you can copy any emoji with one click.
Image Mirror & Flip Tool – Horizontal, Vertical & Both
Easily mirror or flip any uploaded image horizontally, vertically, or both. Processed entirely in your browser for instant results and privacy.
Custom Keyboard Layout Visualizer for Touch Typing
Design a custom keyboard layout and save it as an image to help learn touch typing on a custom keymap. Supports ANSI, ISO, and ortho layouts.
Image Sharpening Tool – Unsharp Mask Effect Online
Enhance edge definition with a simple sharpening filter. Adjust the strength to improve clarity without introducing significant noise.