Guides

These pages are written explanations, not tool clones. Each one covers a decision or a limit that does not fit inside a widget: when a PDF compressor turns text into pictures, what a chapter timestamp list must include, why a LUFS number is a reference, and what the YouTube calculators on this site refuse to promise.

Tool-specific walkthroughs still live on the tool pages. Start here when you want the topic, not the form.

• Privacy

  How these tools run in your browser (and what that actually means)

  PDF.js, Canvas, and FFmpeg.wasm process files in the tab. Nothing is uploaded to a Free Creator Tools server. Here is what that enables, and where it still fails.

  Updated 2026-08-29

• YouTube

  YouTube chapter timestamps: the rules that actually reject a description

  Chapters need a 0:00 line, at least three entries, and 10-second gaps. This is a formatting guide, not a ranking trick.

  Updated 2026-08-29

• PDF

  When compressing a PDF destroys selectable text

  Our compressor redraws pages as JPEG images. That shrinks scans. It is the wrong tool for a text-heavy contract you still need to copy from.

  Updated 2026-08-29

• Audio

  LUFS targets for YouTube and podcasts are references, not a pass/fail stamp

  Integrated loudness, LRA, and true peak from ebur128. Why −14 LUFS is a teaching chip, not a YouTube certification.

  Updated 2026-08-29

• YouTube

  SRT files vs YouTube auto-captions: what a text toolkit can and cannot do

  Shift, merge, and clean subtitle files in the browser. This is not speech-to-text, not burn-in, and not a VTT exporter.

  Updated 2026-08-29

• Image

  JPG, PNG, and WebP: which format to export for thumbnails, posts, and screenshots

  Canvas re-encoding in the browser. When PNG is the right call, when JPG is enough, and what WebP still breaks in some uploaders.

  Updated 2026-08-29

• YouTube

  YouTube RPM vs CPM: teaching math, not a payout forecast

  RPM is revenue ÷ views × 1000. The 55% split is a sketch. Geography, length, and ads.txt status live in YouTube Studio — not in a browser calculator.

  Updated 2026-08-29

• Typing

  Touch typing for people who write descriptions, scripts, and captions all day

  Home row, accuracy before speed, and why a 60-second test is a snapshot — not a career metric. How the lessons on this site are structured.

  Updated 2026-08-29

• YouTube

  What the YouTube calculators on this site are (and are not)

  Earnings, CTR, growth, RPM, sponsorship, and “viral” scores are arithmetic on numbers you type. They are not Studio, not an API, and not a guarantee.

  Updated 2026-08-29