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No registration or installation required - a collection of practical web tools.
From tax calculation (Invoice System compliant), image compression (Core Web Vitals optimized), to color conversion (WCAG 2.1 compliant) - tools you need for business and daily life are all here.
Everything runs in your browser, ensuring privacy and security. Your data never leaves your device and is processed locally.
Carefully selected high-quality tools trusted by professionals
Fully compliant with invoice system. Accurate tax calculations for invoicing and accounting. Used by freelancers and companies alike.
Reduce image size while maintaining quality. Significantly improve blog and website loading speed for better SEO.
Convert between HEX, RGB, and HSL. Includes accessibility checker for web design and app development.
Automatically calculate accurate age from birth date. Useful for resumes and official documents.
Instantly convert between Western and Japanese calendar years. Accurately handles Heisei-Reiwa transition for official documents.
Instantly generate high-quality QR codes from URLs or text. Perfect for events, business cards, and flyers.
Generate strong, unpredictable random passwords. Perfect for managing multiple accounts securely.
Count characters, lines, and manuscript pages in real-time. Essential for reports, papers, and blog writing.
Invoice creation, tax calculation, loan simulation, and more. Tools to streamline your business operations with accurate calculations and compliance support.
[2024 Edition] Calculate 10% and 8% (reduced rate) consumption tax at once. Easy conversion between tax-inclusive and tax-exclusive prices. Free simulator for invoice system verification.
[2025 Edition] Calculate withholding tax and net income from freelance fees. Supports two-tier tax rates over 1 million yen, consumption tax handling, and reverse calculation from net income.
Easily simulate mortgage and auto loan repayments. Supports both equal installment and equal principal payments. Instantly calculate monthly payments and total interest.
Create digital seal images by entering your surname. Download in transparent PNG format. Perfect for remote work document approvals.
Auto-generate business emails for apologies, requests, and thanks with proper honorifics. Save time with templates. Easy creation.
Automatically calculate stamp combinations that match your desired amount. Supports 1-1000 yen stamps. Convenient tool for efficient post office purchases.
Easily create address labels for Japanese envelopes. Print on white paper and affix to envelopes. Supports Naga-3 and Kaku-2 envelope sizes, horizontal writing only.
PDF merge, split, reorder, rotate, add page numbers, and image-to-PDF conversion in one tool. Completely browser-based processing for security. Free.
Auto-fill addresses from postal codes and standardize notation. Batch format full-width/half-width characters and prefecture names. Convenient for data cleansing.
QR code generation, color conversion, JSON formatting, and more. Streamline web development and design work with WCAG 2.1 accessibility compliance.
Generate high-quality QR codes instantly from URLs or text. Download as images. Perfect for events, business cards, and flyers.
Convert between HEX, RGB, and HSL color codes. Pick a color to get all format codes instantly. Essential free tool for web design and development.
Generate strong and secure random passwords. Customize length and character types, create multiple passwords at once. Simplify account creation instantly.
Safely encode and decode URLs with Japanese characters and special symbols. Essential for web development, API integration, and link sharing. Real-time conversion support.
JSON formatting and diff comparison in one tool. Essential for API development and debugging. Browser-based processing ensures confidential data security.
SHA-256/MD5 hash generation, AES encryption/decryption, and Base64 encoding executed in browser. Perfect for security development and testing.
Convert Markdown to HTML instantly. Real-time preview with CommonMark support. Perfect for blog articles and technical documentation creation.
Free editor that renders Mermaid code into diagrams as you type. Five templates including flowchart, sequence and Gantt, with SVG and PNG export.
Generate large volumes of test data including Japanese names (kanji/kana), addresses, phone numbers, and emails. Perfect for development and testing sample data creation.
Check your global IP address instantly. Supports IPv4/IPv6. Useful for network configuration and troubleshooting.
Image compression (Core Web Vitals optimized), cropping, EXIF removal, and more. Essential tools for image processing before web publication, all browser-based for privacy.
Compress images while maintaining high quality to reduce file size. Create mockups with smartphone and PC frames. Secure browser-based processing, completely free.
Crop images with preset aspect ratios for passport photos, Instagram, X (Twitter), and more. Perfect for profile pictures and ID photos.
View and remove metadata like location and date from photos. Essential for privacy protection before uploading to social media. Fully browser-based processing.
Date calculation, calendar conversion, age calculator, and more. Essential tools for official document preparation and deadline management.
Free date calculator for period calculation and date arithmetic. Supports leap years. Calculate dates after/before a specific date or find the period between two dates instantly.
Convert between Western calendar and Japanese era names (Reiwa, Heisei, Showa, Taisho, Meiji) instantly. Free tool with reference chart for birthdate verification and document creation.
Calculate current age from birth year instantly. Supports both Western and Japanese calendars, displays school grade and zodiac sign. Useful for resume creation and age verification.
A timer that automatically cycles between 25-minute focus sessions and 5-minute breaks. Boost productivity for work and study with notifications and offline PWA support.
Countdown timer and stopwatch in one tool. Features lap time recording and notifications. Perfect for cooking, exercise, and work time tracking.
Work out which pregnancy week and day you are in from your due date, treating it as 40 weeks 0 days. Converts between weeks and months, with a reference table for weeks 0-41.
Character counting, text formatting, seasonal words, and more. Streamline writing and editing for reports, papers, and blog posts.
Real-time character, line, and manuscript page counter. Perfect for reports, essays, and blog posts. Free tool with options to include/exclude line breaks and spaces.
Free online notepad for your browser. Auto-save feature with character count, download, and print support. No registration required.
Batch process text line breaks (CRLF/LF), remove spaces, convert between full-width and half-width characters. Convenient free tool for text formatting and cleanup.
Search seasonal greetings for letters and emails by month and period. Essential for Japanese business correspondence and seasonal greetings. Based on 24 solar terms and haiku kigo.
Automatically convert hiragana and katakana to romaji (Hepburn/Kunrei systems). Convenient free tool for passport applications and international documents.
Read EPUB, PDF and TXT files one phrase at a time. Pick a chapter, and the reader remembers where you stopped.
Finds email addresses, phone numbers, addresses and names in text you paste and replaces them with symbols or labels. For preparing a document before handing it to an AI chat or an outside service. Everything runs in your browser.
Tool tips, productivity hacks, and useful knowledge for business and development.
You cannot install a notes app on your work laptop, and drafting in an email feels wrong. A browser notepad fills the gap - but you should know where it stores things, and where it does not. A practical look at what it suits and what it does not.
You asked an AI to summarise your meeting notes and got something vague back. Often the problem is in how the text was handed over. A practical routine for preparing text before you paste it, and for handling what comes back - all in the browser.
Printing a PDF just to stamp it and scan it back is a round trip you can often skip. But a seal image does not suit every document. This guide sorts out where it works and where it does not, based on what the seal is actually being asked to do.
ToolMarche is a collection of web tools designed to be a welcoming place you can casually visit, just like a market.
We value the experience of having tools ready when you need them - those moments when you think "I wish there was a tool for this..."
No registration or app installation required. Just open your browser and start using our tools immediately.
ToolMarche is here to solve your everyday challenges.