Common online tools, no installation required, ready to use.
Text Tools
Base64 Converter
Encode and decode text or strings to/from Base64, supports UTF-8.
Hash Calculator
Compute MD5, SHA-1, SHA-256, SHA-512 and HMAC hashes online.
JWT Parser
Decode and inspect JWT (JSON Web Token) header, payload and signature; no verification.
URL Encode/Decode
Encode text to URL-safe percent-encoding or decode URL-encoded strings.
JSON ↔ XML Converter
Convert between JSON and XML formats.
JSON Formatter & Repair Tool
Format and beautify JSON, auto-repair invalid JSON; configurable indent, syntax highlighting and line numbers.
Text Case Converter
Convert letter case (upper/lower/capitalize/sentence/toggle), replace spaces/underscores/camel/newlines, clear spaces/newlines/symbols.
Text Statistics
Count lines, characters, words, sentences, paragraphs, and bytes; output in JSON, plain text or Markdown.
Remove Line Breaks
Remove all line breaks from text; result replaces input, undo supported.
Remove Duplicate Lines
Remove duplicate lines from text; optional case-sensitive, with stats and duplicate list below.
Image Tools
Base64 Image Converter
Convert images to Base64 strings and vice versa. Display images from Base64 text or upload images to generate Base64.
Image Border & Radius
Add rounded corners and borders to images; borders support multi-color gradient with customizable colors and opacity.
Image Resize
Resize images by width, height (keep ratio), or custom width and height; no cropping.
Image Format Converter
Upload an image and convert to WebP, PNG, JPG, or ICO; download in one click.
Image Compress
Compress images with configurable quality, max dimensions, and output format (WebP, JPG, PNG).
Image Crop
Upload an image, drag to select a crop area; transparent background is preserved, export as PNG.
Gradient Image Generator
Create gradient images with multiple colors, choose direction (top/bottom/left/right/center), set size, and download as PNG.
Image Color Picker
Upload an image and pick a pixel color with a magnifier; get HEX and RGB values, copy with one click.
Image Invert
Upload an image to get its inverted (negative) colors; download the result as PNG.
Image Stitch
Use the first image as base, then stitch more images in four directions; batch upload supported.
Professional
Timestamp Converter
Convert between Unix timestamp (seconds/milliseconds) and human-readable date/time; support local and UTC.
Date Calculator
Select two dates to calculate the difference in years, months, days, hours, minutes and seconds.
Color Picker
Pick colors with a color picker, view in HEX/RGB/HSL and more; includes Japanese and Chinese traditional color palettes.
QR Code Parser
Upload an image containing a QR code to decode and display its text content.
CSS Box Shadow Generator
Generate box-shadow CSS with live preview. Adjust offset, blur, spread, color and opacity, then copy the code.
Bezier Curve Generator
Drag control points to adjust cubic-bezier curve, preview animation easing, and copy CSS code.