# sakutto

> Get it done in a snap.

sakutto is a free online tool suite. Compress PDFs, convert images, generate QR codes, and more — all in your browser. Files are processed locally and never sent to any server.

- URL: https://sakutto.ai
- Operator: miroku Inc.
- Languages: English (en), Japanese (ja)

## Available Tools

### PDF Tools
- [PDF Compressor](https://sakutto.ai/en/tools/pdf-compress): Reduce PDF file size while preserving quality. Perfect for email attachments and uploads.
- [PDF Merger](https://sakutto.ai/en/tools/pdf-merge): Combine multiple PDF files into one document. Drag and drop to reorder pages.
- [PDF Splitter](https://sakutto.ai/en/tools/pdf-split): Split a PDF into separate files. Extract specific page ranges with ease.
- [PDF Rotator](https://sakutto.ai/en/tools/pdf-rotate): Rotate PDF pages by 90°, 180°, or 270°. Fix page orientation from scanned documents.
- [PDF Password Manager](https://sakutto.ai/en/tools/pdf-password): Set or remove passwords on PDF files. All processing happens in your browser for full security.
- [PDF to JPG Converter](https://sakutto.ai/en/tools/pdf-to-jpg): Convert PDF pages to high-quality JPG or PNG images. Adjustable resolution with ZIP download.
- [PDF to WebP Converter](https://sakutto.ai/en/tools/pdf-to-webp): Convert PDF pages to lightweight WebP images. Higher compression than JPG with excellent quality.
- [PDF to PNG Converter](https://sakutto.ai/en/tools/pdf-to-png): Convert PDF pages to lossless PNG images. Transparency support with no quality loss.
- [PDF to Markdown Converter](https://sakutto.ai/en/tools/pdf-to-markdown): Convert PDF content to Markdown format. Auto-detects headings, tables, and lists — ideal for RAG and AI workflows.

### Image Tools
- [JPG to PDF Converter](https://sakutto.ai/en/tools/jpg-to-pdf): Convert JPG, PNG, and WebP images to PDF. Combine multiple images into a single PDF file.
- [PNG to PDF Converter](https://sakutto.ai/en/tools/png-to-pdf): Convert PNG images to PDF with transparency support. Batch convert and merge into one PDF.
- [WebP to PDF Converter](https://sakutto.ai/en/tools/webp-to-pdf): Convert WebP images to universally compatible PDF format. Batch convert and merge supported.
- [Image to PDF Converter](https://sakutto.ai/en/tools/image-to-pdf): Convert JPG, PNG, WebP, GIF, and BMP images to PDF. Merge multiple images into one document.
- [Image Compressor](https://sakutto.ai/en/tools/image-compress): Compress JPEG, PNG, WebP, and HEIC images. Adjust quality, remove Exif data, and convert formats.
- [Image Resizer](https://sakutto.ai/en/tools/image-resize): Resize images to exact dimensions. Includes presets for social media covers and ID photos.
- [HEIC to JPG Converter](https://sakutto.ai/en/tools/heic-to-jpg): Convert iPhone HEIC photos to JPG or PNG. Batch conversion for easy sharing on any platform.
- [WebP Converter](https://sakutto.ai/en/tools/webp-convert): Convert images to WebP or WebP to JPG/PNG. Reduce file size with modern web-optimized format.
- [PNG ⇔ JPG Converter](https://sakutto.ai/en/tools/png-jpg-convert): Convert between PNG and JPG formats. Adjust quality and handle transparent backgrounds.
- [Image Cropper](https://sakutto.ai/en/tools/image-crop): Crop images with freehand selection, fixed aspect ratios, or social media presets.
- [Image Blur & Mosaic](https://sakutto.ai/en/tools/image-blur): Apply mosaic, blur, or black-out effects to hide sensitive areas. Brush and rectangle selection tools.
- [Image Fill & Paint](https://sakutto.ai/en/tools/image-fill): Fill areas and paint on images with bucket fill, brush, and eyedropper tools. Copy HEX/RGB color codes.

### Text Tools
- [Character Counter](https://sakutto.ai/en/tools/character-counter): Count characters, words, lines, and bytes in real time. Great for social media posts and reports.
- [Fullwidth / Halfwidth Converter](https://sakutto.ai/en/tools/fullwidth-halfwidth): Convert between fullwidth and halfwidth characters. Also supports katakana-hiragana conversion for data cleanup.
- [JSON Formatter & Validator](https://sakutto.ai/en/tools/json-formatter): Pretty-print or minify JSON data. Catch syntax errors instantly with line numbers and tree view.
- [Text Diff Checker](https://sakutto.ai/en/tools/diff): Compare two texts side by side and highlight every difference. Character-level detection with merge support.
- [Japanese Era Converter](https://sakutto.ai/en/tools/era-converter): Convert between Western calendar years and Japanese era names (Reiwa, Heisei, Showa). Includes age calculator.
- [Password Generator](https://sakutto.ai/en/tools/password-generator): Generate strong, random passwords instantly. Customize length, character types, and check strength.

### Conversion Tools
- [CSV Encoding Converter](https://sakutto.ai/en/tools/csv-encoding): Fix CSV character encoding issues. Convert between Shift_JIS and UTF-8 to resolve garbled text in Excel.
- [CSV to Excel Converter](https://sakutto.ai/en/tools/csv-to-excel): Convert CSV files to Excel (.xlsx) format. No character encoding issues, with auto column width.
- [CSV Viewer](https://sakutto.ai/en/tools/csv-viewer): View CSV files as readable tables in your browser. Auto-detects encoding with sort and filter support.
- [Excel to CSV Converter](https://sakutto.ai/en/tools/excel-to-csv): Convert Excel files (.xlsx/.xls) to CSV or TSV. Choose sheets, encoding, and line endings.
- [TSV ⇔ CSV Converter](https://sakutto.ai/en/tools/tsv-csv-convert): Switch between TSV and CSV formats with one click. Auto-detects encoding for seamless conversion.

### Web Marketing Tools
- [Related Keywords Finder](https://sakutto.ai/en/tools/related-keywords): Discover keyword suggestions and related search terms in bulk. Export to CSV for SEO research.

## Related Articles
- [Business Document Digitization Guide | How to Go Paperless with Free Tools](https://sakutto.ai/en/articles/business-document-digitization-guide)
- [Japanese Cake Size Chart | Go (号) Sizing, Servings & Price Guide](https://sakutto.ai/en/articles/cake-size-guide)
- [Character Count vs. Byte Count | UTF-8 and Shift-JIS Explained](https://sakutto.ai/en/articles/character-count-bytes)
- [How to Use a Character Counter | Free Real-Time Character Count Tool](https://sakutto.ai/en/articles/character-count-guide)
- [How to Count Characters in Reports and Essays | Tips and Tools](https://sakutto.ai/en/articles/character-count-report)
- [Optimal Character Count for SEO | Title Tags, Meta Descriptions, and Body Content](https://sakutto.ai/en/articles/character-count-seo)
- [Social Media Character Limits 2026 | X, Instagram, YouTube, and More](https://sakutto.ai/en/articles/character-count-sns)
- [Best Free Character Counter Tools Compared | 2026 Guide](https://sakutto.ai/en/articles/character-count-tools-comparison)
- [How to Fix CSV Character Encoding Issues | One-Click Encoding Converter](https://sakutto.ai/en/articles/csv-encoding-guide)
- [UTF-8 vs. Shift_JIS: Understanding CSV Character Encoding](https://sakutto.ai/en/articles/csv-encoding-utf8-sjis)
- [CSV to Excel Formatting Issues? How to Prevent Zero-Dropping and Date Conversion](https://sakutto.ai/en/articles/csv-to-excel-formatting)
- [How to Convert CSV to Excel | Complete Guide to Saving as XLSX](https://sakutto.ai/en/articles/csv-to-excel-guide)
- [How to Open CSV Files | Step-by-Step Guide for Windows, Mac & Mobile](https://sakutto.ai/en/articles/csv-viewer-guide)
- [5 Free Ways to Open CSV Files Without Excel](https://sakutto.ai/en/articles/csv-viewer-without-excel)
- [How to Use a Text Diff Tool | Instantly Spot Differences Between Two Texts](https://sakutto.ai/en/articles/diff-guide)
- [What Is Text Merging? How to Combine Two Documents into One | Free & Browser-Based](https://sakutto.ai/en/articles/diff-merge-guide)
- [How to Use a Text Diff Tool for Proofreading | Never Miss an Edit](https://sakutto.ai/en/articles/diff-proofreading)
- [Text Diff Tool Comparison 2026 | Free Online Tools](https://sakutto.ai/en/articles/diff-tools-comparison)
- [Japanese Envelope Sizes & Postage Rates | Quick Reference Chart for Dimensions and Stamp Costs [2026 Edition]](https://sakutto.ai/en/articles/envelope-size-postage-guide)
- [Japanese Era Notation Rules for Business Documents | Wareki vs. Western Calendar](https://sakutto.ai/en/articles/era-business-docs)
- [How to Calculate Your Age from Birth Year | Japanese Era & Western Calendar Reference Table](https://sakutto.ai/en/articles/era-calculator-age)
- [Japanese Era Names Explained: Reiwa, Heisei, Showa, Taisho, Meiji — Complete Timeline](https://sakutto.ai/en/articles/era-history)
- [Reiwa to Western Year Conversion Table [2019–2030]](https://sakutto.ai/en/articles/era-reiwa-conversion)
- [Best Japanese Era Converter Tools Compared (2026) | Free Options](https://sakutto.ai/en/articles/era-tools-comparison)
- [Chinese Zodiac Chart 2026 | All 12 Animals, Birth Years & Ages](https://sakutto.ai/en/articles/eto-age-chart)
- [Excel Shortcut Keys Cheat Sheet | Essential Keyboard Shortcuts for Windows & Mac](https://sakutto.ai/en/articles/excel-shortcut-keys)
- [File Size Units Explained | KB, MB, GB, TB Conversion Chart](https://sakutto.ai/en/articles/file-size-unit-guide)
- [How to Standardize Full-Width and Half-Width Characters in Data Cleaning](https://sakutto.ai/en/articles/fullwidth-halfwidth-data-cleaning)
- [Full-Width & Half-Width Converter | Free Tool for Batch Character Conversion](https://sakutto.ai/en/articles/fullwidth-halfwidth-guide)
- [How to Batch Convert HEIC Files | Efficiently Convert Hundreds of iPhone Photos to JPG](https://sakutto.ai/en/articles/heic-batch-convert)
- [How to Stop iPhone from Saving Photos as HEIC and Use JPG Instead](https://sakutto.ai/en/articles/heic-iphone-settings)
- [How to Convert HEIC to JPG | The Easy Way to Convert iPhone Photos](https://sakutto.ai/en/articles/heic-to-jpg-guide)
- [HEIC Converter Comparison 2026 | Best Free & Secure Tools Reviewed](https://sakutto.ai/en/articles/heic-tools-comparison)
- [What Is HEIC? Differences from JPG and Why You Need to Convert](https://sakutto.ai/en/articles/heic-what-is)
- [How to Open HEIC Files on Windows | Causes & 5 Solutions (2026)](https://sakutto.ai/en/articles/heic-windows-open)
- [ID Photo Sizes in Japan | mm, Pixel & Ratio Chart for Resumes, Passports & Licenses [2026 Edition]](https://sakutto.ai/en/articles/id-photo-size-guide)
- [How to Batch Compress Images | Free Online Tool for Windows, Mac & Mobile](https://sakutto.ai/en/articles/image-compress-batch)
- [How to Compress Images | Free Online Image Size Reducer](https://sakutto.ai/en/articles/image-compress-guide)
- [How to Compress Images on iPhone | Free, No App Required](https://sakutto.ai/en/articles/image-compress-iphone)
- [JPEG vs PNG: What Is the Difference? Quality, Compression & Use Cases Compared](https://sakutto.ai/en/articles/image-compress-jpeg-png)
- [How to Reduce Image File Size | Keep Dimensions While Shrinking File Weight](https://sakutto.ai/en/articles/image-compress-quality)
- [Best Free Image Compression Tools Compared (2026) | Top 5 Safe & Easy Options](https://sakutto.ai/en/articles/image-compress-tools-comparison)
- [Image Format Guide | JPEG, PNG, WebP, HEIC & AVIF Compared](https://sakutto.ai/en/articles/image-format-guide)
- [How to Resize Images for Free | PC & Mobile Guide to Changing Image Dimensions](https://sakutto.ai/en/articles/image-resize-guide)
- [Social Media Image Sizes (2026) | Complete Guide for X, Instagram, Facebook & More](https://sakutto.ai/en/articles/image-resize-sns)
- [How to Convert JPG to PDF | Free Image-to-PDF Converter](https://sakutto.ai/en/articles/jpg-to-pdf-guide)
- [How to Combine Multiple Images into One PDF | Free & Mobile-Friendly](https://sakutto.ai/en/articles/jpg-to-pdf-multiple)
- [Japanese Tax Return PDF Too Large? How to Compress It for Free](https://sakutto.ai/en/articles/kakuteishinkoku-pdf-compress)
- [How to Fill Out & Submit Year-End Tax Adjustment PDFs in Japan](https://sakutto.ai/en/articles/nenmatsu-chosei-pdf)
- [Paper Size to Pixels Chart | A4, B5, Letter & More at Every DPI](https://sakutto.ai/en/articles/paper-size-pixel-dpi)
- [Password Strength Chart | Crack Times by Length & Character Type (2025 Data)](https://sakutto.ai/en/articles/password-strength-chart)
- [How to Compress Large PDFs for Email | Size Limit Guide](https://sakutto.ai/en/articles/pdf-compress-email)
- [How to Compress a PDF | Free Online PDF File Size Reducer](https://sakutto.ai/en/articles/pdf-compress-guide)
- [How to Compress a PDF on iPhone & Android | No App Required](https://sakutto.ai/en/articles/pdf-compress-iphone)
- [How to Compress PDFs Offline | How Browser-Based Tools Work](https://sakutto.ai/en/articles/pdf-compress-offline)
- [How to Compress PDFs Without Losing Quality | Best Settings by Use Case](https://sakutto.ai/en/articles/pdf-compress-quality)
- [Best Free PDF Compressors Compared | 2026 Online Tool Review](https://sakutto.ai/en/articles/pdf-compress-tools-comparison)
- [What Is a PDF? Complete Guide to Editing, Converting & Compressing](https://sakutto.ai/en/articles/pdf-guide)
- [5 Ways to Use PDF Merging in Business | Streamline Documents & Reports](https://sakutto.ai/en/articles/pdf-merge-business)
- [How to Merge PDF Files for Free | Combine PDFs Online](https://sakutto.ai/en/articles/pdf-merge-guide)
- [Are Online PDF Merge Tools Safe? | Security Risks and How to Choose](https://sakutto.ai/en/articles/pdf-merge-security)
- [Best Free PDF Merge Tools Compared | 2026 Online Tool Review](https://sakutto.ai/en/articles/pdf-merge-tools-comparison)
- [How to Merge PDFs on Windows | Free Methods for Windows 11 & 10](https://sakutto.ai/en/articles/pdf-merge-windows)
- [How to Split a PDF | Free Tool to Extract and Save Pages](https://sakutto.ai/en/articles/pdf-split-guide)
- [How to Batch Convert PDFs to JPG | High-Quality Bulk Image Conversion](https://sakutto.ai/en/articles/pdf-to-jpg-batch)
- [How to Convert PDF to JPG | Free High-Quality Image Conversion](https://sakutto.ai/en/articles/pdf-to-jpg-guide)
- [Best Free PDF to JPG Converters Compared | 2026 Online Tool Review](https://sakutto.ai/en/articles/pdf-to-jpg-tools-comparison)
- [How to Add a QR Code to Your Business Card | Placement, Size & Design Tips](https://sakutto.ai/en/articles/qr-code-business-card)
- [How to Design a Custom QR Code | 7 Tips to Stand Out & Boost Scan Rates](https://sakutto.ai/en/articles/qr-code-design-tips)
- [How to Create QR Codes for Events | Check-in, Tickets & Payments](https://sakutto.ai/en/articles/qr-code-event)
- [How to Create a QR Code | Free Tool for Business Cards, Flyers & More](https://sakutto.ai/en/articles/qr-code-guide)
- [QR Code Won't Scan? 7 Common Causes and How to Fix Them](https://sakutto.ai/en/articles/qr-code-not-reading)
- [QR Code Placement Guide for Flyers & Posters | Maximize Scan Rates](https://sakutto.ai/en/articles/qr-code-print-placement)
- [QR Codes for School Festivals | Flyers, Admission & Cashless Payments](https://sakutto.ai/en/articles/qr-code-school-festival)
- [QR Code Size Guide | Recommended Sizes for Print & Screen](https://sakutto.ai/en/articles/qr-code-size-guide)
- [QR Code Generator Comparison | Top 5 Free Tools & How to Choose](https://sakutto.ai/en/articles/qr-code-tools-comparison)
- [QR Code URL Changed After Printing? How to Fix It & Prevent It](https://sakutto.ai/en/articles/qr-code-url-changed)
- [How to Find Related Keywords | Bulk Keyword Research with a Free Tool](https://sakutto.ai/en/articles/related-keywords-guide)
- [SEO Keyword Research Strategy | 5 Tips to Boost Rankings with Related Keywords](https://sakutto.ai/en/articles/related-keywords-seo)
- [How to Create a Resume PDF | Free, Mobile-Friendly, With Photo](https://sakutto.ai/en/articles/resume-pdf-guide)
- [Japanese School Enrollment & Graduation Year Chart [2026 Edition] | Quick Reference for Resumes](https://sakutto.ai/en/articles/school-enrollment-graduation-year)
- [Social Media Profile Image Sizes | X, Instagram, YouTube & More (2026)](https://sakutto.ai/en/articles/sns-profile-image-size)
- [Tablespoon & Teaspoon to Grams Chart | 30+ Ingredients Converted](https://sakutto.ai/en/articles/tablespoon-teaspoon-gram-guide)
- [TV & Monitor Size Chart | Inches to cm, Area & Viewing Distance Guide](https://sakutto.ai/en/articles/tv-inch-size-guide)
- [Japanese Era ↔ Western Year Quick-Reference Table [2026 Edition]](https://sakutto.ai/en/articles/wareki-seireki-hayamihyo)
- [How to Convert to WebP | Easily Convert JPG & PNG to WebP](https://sakutto.ai/en/articles/webp-convert-guide)
- [What Is WebP? Pros, Cons, and Browser Support Explained](https://sakutto.ai/en/articles/webp-what-is)

## More Information

- Full details: https://sakutto.ai/en/llms-full.txt
- Sitemap: https://sakutto.ai/sitemap.xml