Online Tool Store
2,464 Articles
Blogs
Practical guides for real tasks — written by the people building the tools on this site.
Showing 1,870–1,890 of 2,464 articles
🔄 Video & Audio
How to Rotate or Flip a Video Right in Your Browser
Rotate a video by 90/180/270 degrees and flip it horizontally or vertically, then download the result, without opening a full video editor.
🔢 Math & Science
How to Round a Number to Any Decimal Place or Multiple
Round a number to a chosen number of decimal places or to the nearest multiple, with standard round, ceiling, and floor results shown together.
🔤 Education
How to Run a Spoken Spelling Test From Any Word List
Turn any word list into a spoken spelling test using text-to-speech, with automatic grading and a results summary, without reading every word aloud yourself.
➕ Data & CSV
How to See a Running Total From a List of Numbers
Paste a list of numbers and see the running (cumulative) total after each entry, plus the final sum, in a clear table, for tracking a balance over time.
🏷️ Social Media
How to See a YouTube Video's Hidden Tags
Extract a YouTube video's hidden tags from its pasted page source, shown as copyable chips, without installing a browser extension or logging in.
🔒 Security & Privacy
How to Share a Self-Destructing Secure Note
Use a secure note burner to create private self-destructing notes encoded in the URL hash, with no uploads or account required.
🖼️ Image Tools
How to Sharpen a Soft Photo Online
Use an image sharpener with unsharp mask controls for amount, radius, and threshold to crisp up soft photos in your browser.
🎓 Education
How to Show Classroom Noise Levels
Use a classroom noise meter for a projector-friendly color volume display with sustained-noise alerts and no recording.
📐 Math & Science
How to Solve Any Side of a Right Triangle
Solve for a right triangle's hypotenuse or either leg using the Pythagorean theorem, with input validation and the formula shown, for homework or real measurements.
📊 Data & CSV
How to Split a Huge CSV Into Smaller Files
Split a large CSV file into smaller chunks by row count, with the header repeated in each piece, so it stops crashing your spreadsheet app or upload form.
🧾 Finance Calculators
How to Split a Restaurant Bill Fairly by Item
Split an uneven restaurant bill fairly by assigning items to the right person, with tax and tip divided proportionally, instead of splitting the total evenly.
🎬 Video & Audio
How to Split a Video Into Equal Parts
Use a video splitter to cut one video into equal parts or fixed-length segments, choosing fast keyframe cuts or exact re-encoded cuts.
📊 Text & Writing
How to Split Delimited Text Into Aligned Columns
Paste comma, tab, or custom-delimited text and instantly split it into neatly aligned columns, viewable as plain text or a table.
📊 Data & CSV
How to Split One Column Into Several
Use a column splitter to divide one CSV or text column by delimiter, regex, fixed widths, or positions without losing the remainder.
✂️ Text & Writing
How to Split Text With a Separator
Use a text separator to split pasted text with chosen delimiters, output formatting, and whitespace controls in your browser.
🔍 Image Tools
How to Spot Pixel Differences Between Two Images
Compare two images pixel by pixel with an adjustable sensitivity threshold, highlighting differences in red with a percentage summary, in your browser.
🔒 Security & Privacy
How to Strip Identifying Metadata From Files
Use a metadata scrubber to remove identifying metadata from files in your browser before sharing them publicly or externally.
📺 Social Media
How to Structure a YouTube Video Description
Build a structured YouTube video description — summary, clickable timestamps, links, and hashtags — assembled instantly instead of copy-pasting an old one.
➕ Data & CSV
How to Sum a Pasted List of Numbers Instantly
Paste a list of numbers and instantly get the sum, average, count, minimum, and maximum, parsed from lines, commas, or spaces, without opening a spreadsheet.
🎧 Audio
How to Test the Highest Frequency You Can Hear
Play adjustable pure tones from 20 Hz to 20,000 Hz to find the highest frequency you can actually hear, generated directly in your browser with no app needed.
🌍 Education
How to Test Your World Capitals Knowledge With a Quiz
Test your knowledge of world capitals with a randomized 10-question multiple-choice quiz and instant scoring, right in your browser.