Practical guides
Practical Rakuruno workflows for text cleanup, PDFs, QR codes and business-day counting, with examples and checks before you use the result.
Go directly to a tool to start working, or choose a guide below when you need help with assumptions, workflow or checking the result.
Clean an Excel list: whitespace, character width, then duplicates
Follow three fictional product codes through whitespace cleanup, full-width conversion and deduplication, with checks before pasting back into Excel.
Check where a PDF merger processes files before using a work computer
Use fictional PDFs to verify Rakuruno’s local merging workflow, distinguish file processing from page traffic, and identify cases that need an approved workplace tool.
Do free QR codes expire? Check the code and its destination separately
See what Rakuruno stores in a static QR code, distinguish code expiry from a changed destination, and check a saved code before printing.
Turn multiple images into one PDF in the order you checked
Arrange a cover and two body images, generate and inspect a three-page PDF, and understand image quality, transparency and size limits.
When is five business days later? Define the start day and holidays first
Find five business days after a Friday, compare date-range and add/subtract modes, and check weekly days off, additional holidays and start-day inclusion.
What browser-local processing means: input, storage and network traffic
Distinguish Rakuruno’s on-device processing, 30-day drafts and page or Analytics traffic, with practical checks for shared computers and tool-link sharing.
Text, bills, time and color workflows
Prepare short text and check its character count before publishing
Convert full-width letters and digits, trim surrounding spaces and verify a seven-character example, while preserving meaningful punctuation and names.
Calculate a discounted payment before splitting a group bill
Check a fictional 10000 bill with a 20% discount and four people: 8000 total, 2000 each. Then review tips, rounding and the discount’s scope.
Compare a UTC time with Japan time and a Unix timestamp
Convert 2026-01-01 00:00 UTC to 09:00 JST and Unix seconds 1767225600. Verify direction, seconds versus milliseconds and the time zone.
Normalize a color code and check text-to-background contrast
Convert RGB to HEX, then compare blue and white, mint and white, and mint with dark text. Distinguish the displayed ratio, pass/fail result and real-page review.