ioStar
Fast, private, all processed in your browser
JSON Formatter
Format, validate and visualize JSON with syntax highlighting and collapsible tree view.
Timestamp Converter
Convert between Unix timestamps and human-readable dates in multiple formats.
URL Encoder / Decoder
Encode and decode URLs using encodeURIComponent with live bidirectional conversion.
MD5 Hash
Generate MD5 hashes in real-time with upper/lower case toggle.
Gzip Decompressor
Decompress Base64-encoded gzip data instantly in your browser.
Text Diff
Compare two texts side by side with line-by-line difference highlighting.
Regex Tester
Test regular expressions with live match highlighting and group details.
Base64 Converter
Encode and decode text or images to and from Base64 format.
Image Processor
Resize and compress images in the browser using Canvas API with before/after preview.
Crontab Generator
Build cron expressions visually with human-readable descriptions and next-run preview.
Image Watermark
Add custom text watermarks to images, supporting tile mode and single mode with various parameters.
Image Color Picker
Upload an image, move your mouse to preview the color in real-time, and click to extract the color value.
Video Format Converter
Support multiple video formats for online conversion, processed purely in the browser for data security.
Video to Audio Extractor
Extract audio from multiple video formats and output to various audio formats, processed purely in the browser.
Word Counter
Real-time counting of Chinese characters, English words, numbers and other data items, suitable for article, paper, and code line counting.
Nginx Config Generator
Generate Nginx website configuration through interactive options, supporting domain, root directory, redirects and other common configuration options.
Art QR Code Generator
Generate QR codes in multiple artistic styles — square, circle, DSJ, 2.5D, ring, line and more.
QR Code Decoder
Decode QR code images via file upload, clipboard paste, or live camera scanning.
OCR Image to Text
Extract text from images automatically, supporting Simplified Chinese and English, all processed locally.
Rounded Image Generator
Generate rounded-corner PNG images with a transparent background, with real-time preview.
GIF Frame Splitter
Split an animated GIF into individual frame images, with single or batch download.
GIF Maker
Combine multiple images into an animated GIF, with customizable frame rate, size, and drag-to-reorder.
Car Loan Calculator
Calculate monthly payments and total interest for car loans with equal installment and equal principal methods.
Mortgage Calculator
Calculate monthly mortgage payments and total interest for home loans with equal installment and equal principal methods.
Image Stitcher
Combine multiple images into one — horizontal, vertical, or grid layout — with custom gap, padding, and background.