Practical Online Toolbox - Free Tools Collection
Encode and decode text using Base64
An online tool to compare two texts and highlight the differences (diff). Supports split view and unified view.
A simple large screen text display tool supporting custom background color, text color, and font size. Suitable for use as a teleprompter, temporary billboard, or large screen display.
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.
Free online LaTeX formula editor with real-time preview, symbol palette, formula templates, and PNG export.
Real-time Markdown text rendering preview
Free online random username generator supporting Chinese and English with multiple styles.
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.
Free online word cloud generator for multilingual text (Chinese/English/Japanese). Analyze word frequency and export as PNG. Runs locally for privacy.
Online word counting tool to calculate characters, words, and lines.
Online XML formatter, minifier, and XML to JSON converter with tag sorting and syntax highlighting.
Convert between YAML and JSON formats online
Free online Emoji icon generator. Convert any Emoji to PNG icons in multiple sizes and SVG format. Download as a ZIP package. Perfect for favicons and app icons.
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.
Generate multi-size favicons from an image, supporting 16x16 to 512x512
Online Image to Base64 and Base64 to Image converter tool
Compress images to JPEG/PNG/WebP with quality and size settings
Crop images online with free crop or fixed aspect ratios
Merge multiple images horizontally or vertically into one, with customizable gap and background color
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.
Free online vintage photo filter. Convert any photo to retro style with one click. Supports 1920s silent film, 1960s film, 1980s faded styles. Adjust sepia, grain, scratches, and vignette effects.
Free online HTTP Basic Authentication header generator
Convert between HEX, RGB, and HSL color formats
Simple CSV editing and visualization tool, supports online editing, data visualization and export functions
Free online Docker command generator. Quickly generate docker run, exec, logs, build, compose commands. Supports port mapping, volume mounting, environment variables.
Calculate MD5, SHA-1, SHA-256, SHA-512 hash of files online, supports large files
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
Quickly generate common Kubernetes (kubectl) management commands.
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.
Free online random password generator with customizable length and character types.
Online regex testing and debugging tool
Encrypt text with AES-256 and generate temporary share links for secure transmission
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
Quickly generate common iptables commands for firewall management.
Check website accessibility, HTTP status codes, response time, and SSL certificate status.
Generate a unique URL to test and inspect webhooks and HTTP requests.
Free online Cron expression parser with visual builder, expression validation, and execution time preview. Easily create scheduled tasks.
Convert between timestamp and datetime
Free online timezone converter. Parse time strings with timezone offset and convert to multiple timezones instantly. Supports ISO 8601 and various formats.
Free online encrypted QR code generator. Use AES-256 encryption to protect text content and generate QR codes that require a password to view. Runs entirely in your browser for privacy.
Quickly calculate invoice amounts with tax and discount support
Calculate the real Annual Percentage Rate (APR/IRR) of loans with flat rates or fees. Reveal the hidden cost of borrowing.
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
