# Zituo Tools

> A fast, private and multilingual collection of 29 browser-based utilities for PDF files, images, audio, video, text, developer data, dates and focused work.

Zituo Tools is available at https://zituo.net. Core page content is server-rendered, no account is required, and supported file or text processing runs in the user's browser whenever possible.

## Core pages

- [English homepage](https://zituo.net/en/): Complete directory of available tools.
- [Tool update log](https://zituo.net/en/updates/): Release history and newly added tools.
- [Privacy](https://zituo.net/en/privacy/): How local processing and access logs are handled.

## Tools

- [Chinese Lunar Calendar](https://zituo.net/en/tools/chinese-lunar-calendar/): Browse Gregorian and lunar dates, zodiac signs, daily auspiciousness, festivals and official holiday adjustments without page reloads.
- [Unix Timestamp Converter](https://zituo.net/en/tools/unix-timestamp/): Follow the current Unix time and convert timestamps to dates—or dates back to seconds and milliseconds.
- [Image Compressor & Converter](https://zituo.net/en/tools/image-compressor/): Compress, resize and convert JPEG, PNG or WebP images, then download files or a ZIP.
- [Video Compressor](https://zituo.net/en/tools/video-compressor/): Compress video locally with WebCodecs, resize it, change frame rate or remove audio without uploading.
- [Audio Processing Master](https://zituo.net/en/tools/audio-processing-master/): Convert and trim audio, extract audio from video, and follow playback on an interactive waveform locally.
- [Image Cropper](https://zituo.net/en/tools/image-cropper/): Crop rectangular or circular images with exact ratios, sizes, rounded corners and transparent export.
- [Image Watermark](https://zituo.net/en/tools/image-watermark/): Place multiple text and logo watermarks on one image or a batch, then export files individually or as a ZIP.
- [Photo EXIF Viewer & Remover](https://zituo.net/en/tools/exif-viewer-remover/): Inspect camera, date, exposure and GPS fields, then remove EXIF from one photo or a batch without re-encoding pixel data.
- [Merge PDF](https://zituo.net/en/tools/pdf-merge/): Combine multiple PDF files in your chosen order, entirely in the browser.
- [Split & Extract PDF](https://zituo.net/en/tools/pdf-split/): Extract selected page ranges or export every PDF page as a separate file.
- [Images to PDF](https://zituo.net/en/tools/images-to-pdf/): Turn JPEG, PNG and WebP images into one ordered PDF with page-size options.
- [PDF ↔ Word Converter](https://zituo.net/en/tools/pdf-word-converter/): Convert PDF to editable or appearance-preserving DOCX, and turn DOCX files into PDF entirely in your browser.
- [QR Code Generator & Reader](https://zituo.net/en/tools/qr-code/): Create downloadable QR codes or read a QR code from an image.
- [Text Diff](https://zituo.net/en/tools/text-diff/): Compare two texts line by line and highlight additions and removals.
- [JSON Formatter](https://zituo.net/en/tools/json-formatter/): Format, validate, minify and sort JSON data in your browser.
- [CSV / JSON Converter](https://zituo.net/en/tools/csv-json-converter/): Convert CSV tables to JSON and JSON arrays back to CSV.
- [Word Counter](https://zituo.net/en/tools/word-counter/): Count characters, words, lines, sentences, bytes and reading time.
- [Text Deduplicator](https://zituo.net/en/tools/text-deduplicator/): Remove duplicate lines while preserving the original order.
- [Online Notepad](https://zituo.net/en/tools/minimal-memo/): Autosave multiple notes, search and export without signing up.
- [URL / Base64 Codec](https://zituo.net/en/tools/url-base64/): Encode and decode URLs or UTF-8 Base64 text locally.
- [File Hash](https://zituo.net/en/tools/file-hash/): Calculate SHA-256, SHA-384 and SHA-512 checksums for files.
- [Password Generator](https://zituo.net/en/tools/password-generator/): Create strong random passwords with configurable character sets.
- [Markdown Preview](https://zituo.net/en/tools/markdown-preview/): Preview polished Markdown with code highlighting and export it as a styled PDF.
- [Date Calculator](https://zituo.net/en/tools/date-calculator/): Find the difference between dates or add and subtract time.
- [Unit Converter](https://zituo.net/en/tools/unit-converter/): Convert length, mass, temperature, area, volume, speed and data.
- [Number Base Converter](https://zituo.net/en/tools/number-base-converter/): Convert binary, octal, decimal and hexadecimal integers with step-by-step working.
- [Pomodoro Timer](https://zituo.net/en/tools/pomodoro-timer/): Run automatic focus-and-break cycles with custom durations, ambient noise and local session counts.
- [Code Screenshot Generator](https://zituo.net/en/tools/code-screenshot/): Turn highlighted code into polished PNG images with editor themes, window styles and precise typography.
- [JSON to Code Generator](https://zituo.net/en/tools/json-to-code/): Turn JSON into typed models for Go, TypeScript, Java, Rust, Swift, Python and more.

## Languages

- Simplified Chinese: https://zituo.net/zh-cn/
- Traditional Chinese: https://zituo.net/zh-tw/
- English: https://zituo.net/en/
- French: https://zituo.net/fr/
- German: https://zituo.net/de/
- Spanish: https://zituo.net/es/
- Japanese: https://zituo.net/ja/
- Portuguese: https://zituo.net/pt/

## Technical and source notes

- Tool descriptions, usage guides, FAQs and source or methodology notes are visible in each HTML page.
- PDF merge, split and image export use bundled pdf-lib 1.17.1. PDF and Word conversion uses bundled PDF.js 6.1.200, docx 9.7.1, Mammoth.js 1.12.0 and html2pdf.js 0.14.0.
- The Chinese lunar calendar server-renders its first view with github.com/6tail/lunar-go, then uses bundled lunar-javascript 1.7.7 for no-reload browser navigation, zodiac signs, daily auspiciousness and almanac activities. Published holiday and adjusted-workday data are included.
- The code screenshot generator uses local syntax tokenization and the browser Canvas API to render and export PNG images.
- The JSON to Code Generator infers nested types locally and emits models for thirteen programming languages without uploading the input.
- Video Compressor uses the browser WebCodecs API and bundled Mediabunny 1.51.0 to decode, resize, encode and mux MP4 files locally; selected video bytes are not uploaded to Zituo Tools.
- Audio Processing Master converts and trims audio, extracts the primary audio track from video, and draws a synchronized waveform locally with WebCodecs, Web Audio and bundled Mediabunny 1.51.0. MP3 export uses the bundled official Mediabunny MP3 encoder extension.
- Image Watermark places multiple text and logo layers on one image or a batch with relative positioning, then renders JPG, PNG or WebP locally with the Canvas API and packages batch downloads as a ZIP.
- The photo EXIF tool reads CIPA TIFF/Exif directories locally and removes JPEG Exif APP1, PNG eXIf or WebP EXIF containers without re-encoding image pixels.
- Markdown Preview renders common Markdown and syntax-highlighted code locally, then uses bundled html2pdf.js 0.14.0 to export styled A4 PDFs.
- Online Notepad stores multiple plain-text notes in localStorage; each expires 365 days after its latest edit, and times are formatted with Intl.DateTimeFormat.
- Canonical URLs, language alternates, sitemap entries and JSON-LD are generated by the Go application.
- Site summary: 29 free browser tools for PDF, images, watermarks, audio and video, EXIF privacy, text, JSON, code, dates and focus. Private, multilingual and no account required.