The Toolerax Blog — Page 14
Practical guides and tips to get the most out of our tools — and the concepts behind them.
Open Graph Tags Explained
How Open Graph and Twitter Card meta tags control your social share preview, the tags you actually need, the ideal image size, and why previews cache.
Read articleHow to Watermark a PDF
When and how to stamp text across PDF pages: choosing opacity and angle, what watermarks can and can't protect, and doing it without uploading the file.
Read articleIs Keyword Density a Ranking Factor?
The honest answer on keyword density: why it is not a target to hit, how stuffing backfires, and what search engines reward instead.
Read articleHow to Add Text to a Photo
The readability rules for text on images — outlines, contrast, placement, size — plus when text belongs in the image file and when it absolutely doesn't.
Read articleHow to Rotate and Flip an Image
The EXIF orientation bug that makes phone photos display sideways, the difference between rotating and mirroring, and how to fix both losslessly.
Read articleHow to Pick Colors From an Image
Extract exact HEX and RGB values from any photo or logo, avoid the anti-aliasing and compression traps that skew picks, and build a palette that works.
Read articleHow Barcodes Work
What the bars actually encode, how scanners read them in either direction, how EAN/UPC check digits catch typos, and which format to use for what.
Read articleHow CSS Minification Works
What a CSS minifier removes, why render-blocking stylesheets make every kilobyte count, how minification stacks with gzip, and when not to bother.
Read articleYAML vs JSON
YAML is built for humans, JSON for machines. The type-guessing traps (Norway problem, 3.10), what is lost in conversion, and how to pick.
Read articleHow to Format XML
What good XML formatting looks like, which whitespace is safe to change, the errors validators catch, and when to minify instead of beautify.
Read articleHow to Convert Base64 to an Image
Turn a Base64 string or data URI back into a viewable image, recognize formats by their magic-byte prefixes, and fix the five classic decoding failures.
Read articleHow Fancy Text (Unicode Fonts) Works
𝗕𝗼𝗹𝗱 Instagram bios aren't fonts at all — they're mathematical alphabets hiding in Unicode. How the trick works and where it breaks.
Read article