Gezidao

✳ Free · No signup · Runs in your browser

Everyday tools, all on Gezidao.

Text, images, PDFs, calculations and conversions. Free to use, ready when you are.

01

QR Codes

4 tools
→ QR Code Generator Create QR codes for URLs, text, phone, SMS and email — free PNG & SVG downloads. → WiFi QR Code Generator Turn your WiFi name and password into a QR code guests can scan to connect. → QR Code Scanner Decode a QR code from an image — processed locally, never uploaded. → vCard QR Generator Put your contact card into a QR code people can scan and save.
02

Text Tools

17 tools
→ Word Counter Live word, character, sentence and paragraph counts for any text. → Case Converter Convert text to UPPERCASE, lowercase, Title Case, camelCase, snake_case and more. → Remove Duplicate Lines Delete repeated lines from any list, with tidy-up options. → Sort Lines Sort list lines A–Z, numerically, by length — or shuffle them. → Lorem Ipsum Generator Generate placeholder text by paragraphs, sentences or words. → Find and Replace Replace text with case, whole-word and regex options. → Slug Generator Turn any title into a clean, URL-safe slug. → Word Frequency Counter See which words appear most often in your text. → Morse Code Translator Translate text to Morse code and back, letters and numbers. → Roman Numerals Converter Convert numbers to Roman numerals and back (1–3999). → RMB Amount in Words Convert RMB amounts to formal Chinese uppercase words for invoices. → Text Diff Compare two texts line by line — additions and removals highlighted. → Chinese S↔T Converter Convert text between Simplified and Traditional Chinese. → Text to Speech Read any text aloud with your browser's built-in voices. → ROT13 & Caesar Cipher Apply ROT13, Caesar and Atbash transformations. → Whitespace Cleaner Clean spaces, blank lines and invisible characters. → Chinese Number Converter Convert numbers to Chinese numerals.
03

Developer Tools

28 tools
→ JavaScript Formatter Format or minify JavaScript locally. → YAML to JSON Convert simple YAML key-value data to JSON. → YAML Formatter Format and validate common YAML syntax. → TOML Formatter Format and validate common TOML values. → SQL Formatter Format SQL keywords and clauses locally. → User-Agent Parser Identify browser, OS and device from a User-Agent. → CSV Cleaner Remove blank lines and trim CSV rows. → JSON to YAML Convert JSON to YAML locally. → Sitemap XML Generator Generate sitemap.xml from URLs. → robots.txt Generator Generate robots.txt rules. → Open Graph Tag Generator Generate social sharing meta tags. → HTTP Request Generator Generate cURL, Python and JavaScript requests. → HTML Formatter Format or minify HTML. → CSS Formatter Format or minify CSS. → JSON Formatter Beautify, validate and minify JSON with clear error messages. → CSV to JSON Converter Convert CSV tables to JSON arrays and back, with quoted-field support. → UUID Generator Generate random UUID v4 identifiers in bulk. → Regex Tester Test regular expressions against sample text with live match highlighting. → HTML Entities Encoder Escape or unescape HTML special characters safely. → Text to Binary Convert text to UTF-8 binary code and back. → Barcode Generator Generate CODE128 or EAN-13 barcodes and download as PNG or SVG. → Markdown Preview Write Markdown on the left, see rendered HTML live on the right. → XML Formatter Beautify, validate and minify XML with clear error messages. → URL Parser Break any URL into protocol, host, path and query parameters. → MIME Type Lookup Look up common MIME types by extension. → HTTP Status Lookup Look up HTTP status code meanings. → URL Query Editor Parse and edit URL query parameters locally. → Markdown Table Generator Turn tab-separated rows into a Markdown table.
04

Date & Time

9 tools
→ Time Interval Calculator Calculate total duration of time intervals. → Workday Calculator Count working days between dates. → Timestamp Converter Convert Unix timestamps to dates and back, in seconds or milliseconds. → Age Calculator Calculate an exact age in years, months and days — plus the next birthday. → Date Difference Calculator Days, weeks and business days between two dates. → Add or Subtract Days Add or subtract days, weeks, months or years from a date. → Timezone Converter Convert a time between any two cities' time zones. → Date Countdown Live countdown in days, hours, minutes and seconds to any moment. → Lunar Calendar Convert between solar dates and the Chinese lunar calendar.
05

Calculators

15 tools
→ Unit Price Calculator Calculate price per unit. → Unit Converter Convert length, weight, temperature, volume, data size, speed and more. → Percentage Calculator Three common percentage calculations in one place. → BMI Calculator Body Mass Index with metric or imperial units and WHO categories. → Number Base Converter Convert numbers between binary, octal, decimal, hex and any base 2–36. → Interest Calculator Simple or compound interest with an optional year-by-year table. → Tip Calculator Work out the tip and per-person share in seconds. → Discount Calculator See the final price and savings for any percentage off. → Average Calculator Mean, median, sum, min and max for a list of numbers. → Ratio Calculator Solve A:B = C:X for the missing value. → Loan Calculator Monthly payments and total interest for equal-installment or equal-capital loans. → Income Tax Calculator Estimate monthly Chinese individual income tax and take-home pay. → Due Date Calculator Estimate the due date and current pregnancy week from the LMP. → BMR & TDEE Calculator Daily calorie needs: basal metabolism and total energy expenditure. → Sleep Cycle Calculator Find the best bedtime based on 90-minute sleep cycles.
06

Encoding & Hashes

6 tools
→ Encrypted Text Encrypt and decrypt text locally with AES-GCM. → Base64 Encoder & Decoder Encode or decode Base64 text, with full UTF-8 support. → Hash Generator MD5, SHA-1, SHA-256 and SHA-512 for text or files, computed locally. → URL Encoder & Decoder Percent-encode or decode URLs and query parameters safely. → JWT Decoder Inspect a JWT's header and payload claims — nothing leaves your browser. → Base32 Codec Encode and decode Base32 text locally.
07

Image Tools

15 tools
→ Image Rounded Corners Add rounded corners and shadow to an image. → Image EXIF Cleaner Remove image metadata by re-encoding locally. → Image Stitcher Combine multiple images vertically. → SVG to PNG Convert SVG to PNG locally. → Image Palette Extractor Extract dominant colors from an image. → SVG Compressor Compress SVG markup locally. → Image Compressor Shrink JPG, PNG or WebP files in your browser — nothing is uploaded. → Image Format Converter Convert images between PNG, JPG and WebP — locally in your browser. → Image Resizer Resize images to exact pixel dimensions right in your browser. → Image to Base64 Turn an image into a Base64 data URI for CSS or HTML. → Image Rotate & Flip Rotate images by 90° steps and mirror them horizontally or vertically. → Favicon Generator Create 16–64 px favicons plus a multi-size .ico file. → Image Color Picker Click any pixel of an image to read its exact color. → Image Cropper Crop images to any size or aspect ratio, right in your browser. → Image Watermark Add a text watermark to photos — position, size and opacity control.
08

PDF Tools

10 tools
→ PDF Page Reorder Reorder PDF pages locally. → PDF to Image Render PDF pages as PNG images locally. → PDF to Text Extract text from PDF pages locally. → PDF Compressor Re-save PDF with compressed object streams. → PDF Watermark Add text watermark to PDF pages locally. → PDF Page Extractor Extract selected PDF pages locally. → Rotate PDF Rotate PDF pages locally. → Merge PDF Combine several PDFs into one file, in your chosen order. → Split PDF Extract or remove page ranges from a PDF. → Images to PDF Bundle JPG, PNG or WebP images into a single PDF.
09

Color Tools

3 tools
→ Color Converter Convert colors between HEX, RGB and HSL with a shade palette. → Gradient Generator Design CSS linear gradients visually and copy the code. → Contrast Checker Check text/background color contrast against WCAG AA and AAA.
10

Password & Random

7 tools
→ Passphrase Generator Generate memorable secure passphrases. → Password Generator Create strong random passwords with adjustable length and character sets. → Password Strength Checker See how strong a password is and how long it takes to crack. → Random Number Generator Cryptographically strong random numbers in any range. → Coin Flip Flip one or many coins and see heads/tails statistics. → Dice Roller Roll up to 20 dice — d4 to d100 — with automatic totals. → Random Group Splitter Split a list of names into fair random groups.