实用的在线工具坞 - 免费在线工具集合
Encode and decode text using Base64
Format, compress and validate JSON data
Free online JSON to Table converter tool. Convert JSON arrays to HTML tables and export to CSV/Excel files. Runs locally to protect your data privacy.
Real-time Markdown text rendering preview
Free online Unicode converter tool. Convert text to Unicode and Unicode to text. Supports \\uXXXX, &#xXXXX;, and &#XXXX; formats. Runs locally in your browser for privacy.
Online URL encode and decode tool.
Online word counting tool to calculate characters, words, and lines.
Free online EXIF viewer. Drag or select images to parse camera model, shutter speed, aperture, ISO, focal length, shooting time, and GPS. All parsing runs locally in your browser.
Online Image to Base64 and Base64 to Image converter tool
Compress images to JPEG/PNG/WebP with quality and size settings
Hide text messages inside image pixels. Supports batch processing, runs locally in browser for privacy.
Free online image to SVG converter, converts JPG/PNG bitmaps to SVG vector graphics. Supports color count and blur adjustment, processes locally in browser.
Add text watermark to your images easily. Customize position, color, size, and opacity.
Generate beautiful Open Graph (OG) images online for blog posts and social media share cards.
Free online tool to remove white background from images and convert to transparent PNG. Supports threshold adjustment, processes locally in browser for privacy.
Convert between HEX, RGB, and HSL color formats
Fetch website HTTP response headers, analyze security configurations (HSTS, CSP), and detect information leakage risks.
Edit JSON online and generate a permanent API link for frontend development and debugging.
Online JWT (JSON Web Token) decoder tool
Generate Lorem Ipsum placeholder text online.
Extract Meta tags, Open Graph info, and Twitter Cards from webpages, and preview how they look on Google, Facebook, and Twitter.
Online regex testing and debugging tool
Generate standard UUID/GUID unique identifiers
View your browser fingerprint information online
Check DNS records (A, MX, NS, etc.) and Whois information for any domain
Look up your IP address and geolocation information online
Check website accessibility, HTTP status codes, response time, and SSL certificate status.
Generate a unique URL to test and inspect webhooks and HTTP requests.
Convert between timestamp and datetime
Quickly calculate invoice amounts with tax and discount support
Convert numbers to Chinese RMB uppercase
Upload an image to decode QR codes locally in your browser
Online QR Code generator tool
Drag student photos to start a raffle; file name is the student's name