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Compress PDFs, convert images, generate QR codes, and more — all in your browser. Free, no sign-up required.
All Tools
PDF Editing
PDF Compressor
Reduce PDF file size while preserving quality. Perfect for email attachments and uploads.
PDF Merger
Combine multiple PDF files into one document. Drag and drop to reorder pages.
PDF Splitter
Split a PDF into separate files. Extract specific page ranges with ease.
PDF Rotator
Rotate PDF pages by 90°, 180°, or 270°. Fix page orientation from scanned documents.
PDF Password Manager
Set or remove passwords on PDF files. All processing happens in your browser for full security.
Convert from PDF
PDF to JPG Converter
Convert PDF pages to high-quality JPG images. Adjustable resolution with ZIP download. (PNG conversion available in a separate tool.)
PDF to WebP Converter
Convert PDF pages to lightweight WebP images. Higher compression than JPG with excellent quality.
PDF to PNG Converter
Convert PDF pages to lossless PNG images. Transparency support with no quality loss.
Extract Images from PDF
Extract embedded images (photos, charts, logos) from PDF files individually. Selective download and ZIP bulk download supported.
Image to Image
HEIC to JPG/PNG/WebP Converter
Convert iPhone HEIC photos to JPG, PNG, or WebP. Batch conversion with quality control.
WebP Converter
Convert images to WebP or WebP to JPG/PNG. Reduce file size with modern web-optimized format.
PNG ⇔ JPG Converter
Convert between PNG and JPG formats. Adjust quality and handle transparent backgrounds.
Image to PDF
JPG to PDF Converter
Convert JPG, PNG, and WebP images to PDF. Combine multiple images into a single PDF file.
PNG to PDF Converter
Convert PNG images to PDF with transparency support. Batch convert and merge into one PDF.
WebP to PDF Converter
Convert WebP images to universally compatible PDF format. Batch convert and merge supported.
Image to PDF Converter
Convert JPG, PNG, WebP, GIF, and BMP images to PDF. Merge multiple images into one document.
Image Editing
Image Compressor
Compress JPEG, PNG, WebP, and HEIC images. Adjust quality, remove Exif data, and convert formats.
Image Resizer
Resize images to exact dimensions. Includes presets for social media covers and ID photos.
Image Cropper
Crop images with freehand selection, fixed aspect ratios, or social media presets.
Image Blur & Mosaic
Apply mosaic, blur, or black-out effects to hide sensitive areas. Brush and rectangle selection tools.
Image Fill & Paint
Fill areas and paint on images with bucket fill, brush, and eyedropper tools. Copy HEX/RGB color codes.
Background Remover
Free online background remover. Click the background color to make it transparent and save as PNG. Runs fully in your browser — your image is never sent to a server.
Character Counter
Count characters, words, lines, and bytes in real time. Great for social media posts and reports.
Fullwidth / Halfwidth Converter
Convert between fullwidth and halfwidth characters. Also supports katakana-hiragana conversion for data cleanup.
JSON Formatter & Validator
Pretty-print or minify JSON data. Catch syntax errors instantly with line numbers and tree view.
Text Diff Checker
Compare two texts side by side and highlight every difference. Character-level detection with merge support.
Japanese Era Converter
Convert between Western calendar years and Japanese era names (Reiwa, Heisei, Showa). Includes age calculator.
Password Generator
Generate strong, random passwords instantly. Customize length, character types, and check strength.
World Clock
See the live current time in major cities worldwide at once, to the second. Add, reorder and remove cities, with automatic DST. Great for checking time differences.
PDF to Markdown Converter
Convert PDF content to Markdown format. Auto-detects headings, tables, and lists — ideal for RAG and AI workflows.
Word to Markdown Converter
Convert Word (.docx) files to Markdown. Preserves headings, tables, and lists. Runs entirely in your browser — safe for confidential documents.
Excel to Markdown Converter
Convert Excel (.xlsx / .xls / .csv) files to Markdown tables. Each sheet becomes a GFM pipe table. Runs entirely in your browser — safe for confidential data.
PowerPoint to Markdown Converter
Convert PowerPoint (.pptx) files to Markdown. Each slide becomes a `## Slide N` heading with body text, bullet lists, and speaker notes preserved. Runs entirely in your browser — safe for confidential decks.
HTML to Markdown Converter
Convert HTML (.html / .htm) files or pasted HTML code to Markdown. Preserves headings, tables, lists, links, and code blocks. Runs entirely in your browser — safe for confidential HTML.
URL to Markdown Converter
Convert any public web page URL to Markdown. Preserves headings, tables, lists, and links — perfect for LLM and RAG preprocessing, research notes, and archiving web articles.
CSV Encoding Converter
Fix CSV character encoding issues. Convert between Shift_JIS and UTF-8 to resolve garbled text in Excel.
CSV to Excel Converter
Convert CSV files to Excel (.xlsx) format. No character encoding issues, with auto column width.
CSV Viewer
View CSV files as readable tables in your browser. Auto-detects encoding with sort and filter support.
Excel to CSV Converter
Convert Excel files (.xlsx/.xls) to CSV or TSV. Choose sheets, encoding, and line endings.
TSV ⇔ CSV Converter
Switch between TSV and CSV formats with one click. Auto-detects encoding for seamless conversion.
Digital Stamp Creator
Create digital stamps (hanko) for business documents. Round, square, and oval shapes with transparent PNG output.
Resume Builder
Build a JIS-standard Japanese resume (rirekisho) with PDF export. Your data stays in your browser.
QR Code Generator
Generate QR codes from URLs or text. Customize colors, add logos, and download instantly.
QR Code Reader
Decode QR code images to instantly extract embedded URLs and text. Upload an image or use your camera.
Latest Articles
All articles
Claude Fable 5 Is Back: US Lifts Export Controls, Adds Safeguards
Claude Fable 5 is back. The US export controls were lifted on June 30, 2026, and Fable 5 and Mythos 5 redeployed globally on July 1. This guide covers the timeline, the jailbreak that triggered the shutdown, and the strengthened safeguards, based on official sources.
What Is Claude Science? A Guide to the AI Workbench for Researchers
A clear, beginner-friendly explanation of what Claude Science is—the AI workbench that unifies research tools—based on official sources: its features, supported fields, NVIDIA integration, which plans can use it and its availability (beta), and the support program. Released by Anthropic on June 30, 2026.
What Is Claude Sonnet 5? Near-Opus Performance and Pricing Explained
A clear, beginner-friendly explanation of Claude Sonnet 5, released by Anthropic on June 30, 2026: what it is, its performance approaching the flagship Opus 4.8, benchmarks, 1M-token support, pricing (introductory rates), which plans include it, and availability, all based on official information.
What Is the EU AI Act Omnibus? Delayed Rules and New Prohibitions Explained
In June 2026, the EU adopted the "Digital Omnibus" amending the AI Act. This article draws on primary sources to explain the delayed application of high-risk AI rules (December 2027 and August 2028), the new provisions banning nudification AI and CSAM (in force from December 2026), and what it all means for businesses in Japan.
Gemini Spark Comes to macOS: The Desktop Agent for Your Mac
Google's Gemini Spark is now on macOS. This desktop AI agent automates time-consuming tasks on your Mac. This guide covers eligibility, new connected apps, MCP support, and the rollout timeline, based on official sources.
What Is Nano Banana 2 Lite? The 4-Second, $0.034 Image AI
Google's Nano Banana 2 Lite (gemini-3.1-flash-lite-image) is the fastest, cheapest image model in the Nano Banana family — about 4 seconds and $0.034 per 1K image. This guide also covers the Gemini Omni Flash video model, pricing, and availability, based on official sources.
Why sakutto?
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Privacy First
Files are processed entirely in your browser and never leave your device. Some AI-powered tools may require server processing — we always let you know upfront.
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Japan-Friendly
Intuitive Japanese UI with tools tailored for Japan-specific needs, like full-width/half-width character conversion and Japanese era date lookup.