Take-Home Salary Calculator (yamada-tools.jp)
Calculate take-home salary after deductions. Provides estimates for social insurance, income tax, and resident tax based on your gross salary.
Invoice Number Validator (yamada-tools.jp)
Verify the registration numbers (T-numbers) of qualified invoice issuers against the National Tax Agency database. Free to use with no registration required.
Consumption Tax Calculator (yamada-tools.jp)
Calculate consumption tax on prices. Supports both 10% standard rate and 8% reduced rate, with options for truncation, rounding up, or standard rounding.
Text Case Converter (yamada-tools.jp)
Convert text between cases such as uppercase, lowercase, title case, sentence case, toggle case, and capitalize.
Text Diff (yamada-tools.jp)
Compare two texts and highlight differences. Added, deleted, and changed parts are visually highlighted for easy review.
Banner Maker (yamada-tools.jp)
Free online tool for creating banner images for SNS, YouTube, and blogs. Supports size presets, text overlay with font and color options, and background image upload or solid color fill. Runs entirely in the browser.
Blur Image (yamada-tools.jp)
Free online tool to apply Gaussian blur effects to images. Supports JPG, PNG, WebP, BMP, and GIF formats with 30 levels of blur intensity adjustment. Processed entirely in the browser for privacy.
Brightness & Contrast Adjuster (yamada-tools.jp)
Free online tool to adjust the brightness and contrast of images. Supports JPG, PNG, WebP, BMP, and GIF formats. All processing is done in the browser, so your images are never uploaded to a server.
Image Compression (yamada-tools.jp)
Free online image compressor that reduces JPEG, PNG, and WebP file sizes by up to 80% while maintaining quality. Supports batch processing of up to 20 images at once with a quality adjustment slider. All processing is done in the browser.
Concentration Lines (yamada-tools.jp)
Add manga-style radial line effects to images. Customize center point, line count, thickness, length, color, and transparency. Processed entirely in the browser.
Crop Image (yamada-tools.jp)
Free online tool to crop images to any size. Supports aspect ratio presets such as 1:1, 16:9, and 4:3, with drag-based position adjustment. Useful for creating SNS profile pictures, banners, and thumbnails.
Decorative Frames (yamada-tools.jp)
Free online tool to add decorative frames to images. Offers a variety of styles including polaroid, film strip, stamp, shadow, gradient, and double border. Frame color and size are customizable. Processed entirely in the browser for privacy.