Envelope Address Printer (yamada-tools.jp)
Free tool for printing mailing addresses on envelopes. Supports major Japanese envelope sizes including Nagagata No. 3, Kakugata No. 2, and Yougata. Postal code auto-completion, vertical/horizontal text orientation, and direct printing or PDF export.
Hanko Generator (yamada-tools.jp)
Free online tool for creating electronic stamp (hanko) images. Supports personal seals (認印), corporate seals (角印), and date stamps. Outputs transparent PNG files ready to insert into Word, Excel, and PDF documents.
Hash Generator (yamada-tools.jp)
Generate hash values such as MD5, SHA-1, and SHA-256 from text or files. Useful for verifying file integrity and checking passwords.
Holiday Checker (yamada-tools.jp)
Check if a specified date is a Japanese public holiday. View the full annual holiday calendar including substitute holidays, and calculate business days.
JSON Formatter (yamada-tools.jp)
Format and prettify compressed JSON data for readability, or minify it for compactness. Includes validation and configurable indentation options (2 spaces, 4 spaces, or tabs).
Lorem Ipsum Generator (yamada-tools.jp)
Generate dummy placeholder text (Lorem Ipsum) for design and layout testing. Supports both Japanese and English dummy text, with options to specify the number of paragraphs or characters.
Year-End Tax Adjustment Calculator (yamada-tools.jp)
Simulate year-end tax adjustment refunds or additional withholdings. Automatically calculates deductions for life insurance premiums, dependent relatives, and housing loan interest.
Password Generator (yamada-tools.jp)
Generate secure random passwords for free. Customize length up to 128 characters and choose character types: lowercase, uppercase, numbers, and symbols. Optionally exclude confusing characters. Processed entirely in the browser.
Password-Protected ZIP Creator (yamada-tools.jp)
Create password-protected ZIP files for free. Compress and encrypt multiple files directly in the browser with no registration required. Files are automatically deleted after 60 minutes.
QR Code Reader (yamada-tools.jp)
Read QR codes from camera or images directly in your browser. Works on PC even without a smartphone. Simply upload an image or use your camera to decode QR codes instantly.
Random Picker (yamada-tools.jp)
A browser-based tool for randomly selecting names or numbers from a list. Useful for lottery draws, deciding order, team formation, and assigning party coordinator roles.
Regex Tester (yamada-tools.jp)
Test regular expressions in real time. Supports highlight display of match results and groups.