
HTML & CSS
Format CSS for Readability Without Changing the Cascade
Reformat CSS with a chosen indentation width, inspect nested rules and literal values, and separate readable layout from syntax or design validation.
Web Dev Tools Base Blog
995 practical guides with worked examples, troubleshooting and links to related tools. Browse by topic or search the full collection.

HTML & CSS
Reformat CSS with a chosen indentation width, inspect nested rules and literal values, and separate readable layout from syntax or design validation.

HTML & CSS
Solve how to check css with a focused html & css workflow and final checks for syntax, semantics, input data and environment-specific output.

HTML & CSS
Apply a CSS gradient to heading text, preserve a solid-color fallback, and check wrapping, forced colors, and readability on the actual background.

Code format minify & diff
Solve how to format code with a focused code format minify & diff workflow and final checks for syntax, semantics. Read the full guide.

Code format minify & diff
Solve how to minify code with a focused code format minify & diff workflow and final checks for syntax, semantics. Beginner friendly.

Color & design
Step through how to generate color palette and verify code conversion, contrast and rendering context before you use or share the result.

Color & design
Measure text against its actual background, interpret the checker’s result, and recheck opacity, interaction states, and responsive layout changes.

Color & design
Replace a HEX color with an equivalent RGB value in a stylesheet while preserving opacity, checking the rendered property and avoiding unsupported alpha inputs.

Code format minify & diff
Use this guide for diff code review; it explains the workflow and how to verify syntax, semantics, input data and environment-specific output.

API & webhooks
Step through how to use postman to test rest api and verify method, URL, headers, body, status and response content before you use or share the result.

API & webhooks
Use this guide for best tool to test rest api; it explains the workflow and how to verify method, URL, headers, body, status and response content.

API & webhooks
Learn how to test rest api in browser: follow a focused api & webhooks workflow, then verify method, URL, headers, body.

API & webhooks
Step through how to test asynchronous rest api and verify method, URL, headers, body, status and response content before you use or share the result.

HTML & CSS
Add a gradient to a button, define hover and disabled styles, preserve a visible keyboard focus ring, and check the foreground against both endpoint colors.

HTML & CSS
Create a linear gradient from two colors, choose an exact direction, position a middle stop, and make a hard boundary while preserving a usable fallback color.

Color & design
Inventory text and control states, test actual foreground/background pairs, and track image backgrounds, exceptions, and unresolved manual checks.

Color & design
Convert sRGB channels to relative luminance, calculate the contrast ratio, verify boundary colors, and avoid rounding a failing result into a pass.

Code format minify & diff
Learn calculate time difference time zones: practical steps plus final checks for syntax, semantics, input data and environment-specific output.

XML tools
Compare parsed XML trees in Python while preserving element order, text, and namespace identities. Test attribute ordering and meaningful whitespace.

XML tools
Use Notepad++ with ComparePlus to review two XML files, distinguish line differences from XML structure, and preserve meaningful whitespace and source files.

Code format minify & diff
Use this guide for vs code text compare; it explains the workflow and how to verify syntax, semantics, input data and environment-specific output.

HTML & CSS
Learn html validation errors: follow a focused html & css workflow, then verify syntax, semantics. Quick steps, free tools.

DNS IP & domain
Step through check what is my dns and verify record type, authoritative data, TTL and resolver cache before you use or share the result.

DNS IP & domain
A practical guide to whois top domain, including the key steps and checks for syntax, semantics, input data and environment-specific output.