All Tools VerseChange Image Opacity (Make a Photo See-Through)
Changing an image’s opacity makes the whole picture more or less see-through, from fully solid to faintly visible, which is how you create watermarks, ove
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Data URIs Explained: Embed Files in a String
A data URI packs a whole file into a single text string, so a small image or snippet of text can be embedded directly in HTML or CSS instead of loading fr
Text to Hex: Convert Strings to Hexadecimal
Text to hex conversion turns each character of a string into its byte value written in hexadecimal, so “Hi” becomes 48 69. Every character has a numeric c
Clean a Messy CSV: Fix Quotes and Missing Fields
Cleaning a messy CSV means fixing the two problems that break imports: rows with missing fields and values that are not quoted correctly. A single ragged
Generate Data from a Regex Pattern
Generating data from a regex pattern produces strings that match a rule you define, so you can create realistic test values such as phone numbers, codes,
Media Types List (MIME Types) by File Extension
A MIME types list: common Content-Type values for text, images, audio, video, fonts, and documents, with their file extensions.
Date and Time Format Cheat Sheet (strftime)
A strftime cheat sheet: date and time format codes like %Y, %m, and %H, with examples and ready-made format strings.
JavaScript String Methods Cheat Sheet
JavaScript string methods at a glance: search, slice, split, replace, trim, pad, and case conversion, with the key gotchas.
Vim Cheat Sheet
A Vim cheat sheet: modes, movement, editing, search and replace, and how to quit, save, copy, and paste.
Docker Commands Cheat Sheet
A Docker commands cheat sheet: images, containers, Compose, volumes, and cleanup, each explained in one line.
JavaScript Array Methods Cheat Sheet
JavaScript array methods at a glance: map, filter, reduce, find, sort, and more, noting which ones change the original array.
CSS Grid Cheat Sheet
A CSS Grid cheat sheet: container and item properties, fr units, minmax, repeat, and auto-fit, with a responsive recipe.