All Tools - Page 4
216 tools available
Page 4 of 9
Hex Encoder / Decoder
Encode or decode hexadecimal strings easily. Convert between readable text and hexadecimal format for data representation and debugging.
HEX to RGB Converter
Convert HEX color codes to RGB format instantly.
HMAC Generator / Verifier (MD5, SHA‑1, SHA‑2, SHA3‑256)
Generate and verify HMAC (Hash-based Message Authentication Code) tags with MD5, SHA-1, SHA-256, SHA-384, SHA-512 or SHA3-256. Decode the secret key as UTF-8 text, hex or base64, and output the tag as hex, base64 or base64url. Runs entirely in your browser — built for API request signing, webhook signature verification and JWT debugging.
HSL to RGB Converter
Convert HSL (Hue, Saturation, Lightness) color values to RGB format and vice versa with real-time preview
HTML Encoder / Decoder
Convert HTML tags and special characters to safe display format (e.g., < → <) or decode them back to HTML. Essential for displaying HTML code safely.
HTML Formatter / Minifier
Beautify or minify raw HTML code. Format HTML for readability or compress it for production use.
HTML Validator
Check HTML against the official W3C Nu validator and see every error in context: line and column, the exact offending markup with the failing range highlighted, and a jump-to-line source view. Paste, upload, or load a URL.
HTTP Header Checker
Inspect the HTTP response headers of a given URL to debug caching, security, and SEO issues. Analyze response headers for performance optimization and security best practices.
Illuminance Converter
Convert between different illuminance units including lux, foot-candles, phot, nox, and more
Image ↔ Base64 Converter
Convert images to Base64 strings and vice versa. Perfect for embedding images in code, CSS, HTML, or APIs. Supports all image formats with multiple output options.
Image Color Palette Extractor
Extract dominant colors from any image to create beautiful color palettes. Upload an image and get hex codes, RGB values, and HSL values for design inspiration.
Image Cropper
Free online image cropper. Drag a crop box or type exact pixel coordinates, lock the ratio to 1:1, 4:3, 16:9 or 9:16, apply Instagram and YouTube size presets, and save as JPEG, PNG or WebP. Runs in your browser, nothing is uploaded.
Image Metadata Viewer/Remover
View and remove EXIF metadata from images including GPS coordinates, camera settings, and personal information. Supports batch processing with drag-and-drop functionality for PNG, JPG, WEBP formats.
Image Resizer
Resize images with drag-and-drop functionality. Supports percentage scaling, custom dimensions, and maintains aspect ratio. Works with PNG, JPG, WEBP, and other image formats.
Image Rotator & Flipper Tool
Rotate and flip images with visual preview. Supports 90-degree rotations, horizontal/vertical flipping, and batch processing. Works with PNG, JPG, WEBP formats.
Image to Grayscale
Convert images to grayscale with drag-and-drop functionality. Apply various grayscale filters and adjust contrast. Works with PNG, JPG, WEBP, and other image formats.
Image Watermarker
Add text or image watermarks to your photos with customizable positioning, opacity, and rotation. Protect your images with professional watermarking features. Supports batch processing and works with PNG, JPG, WEBP formats.
Inductance Converter
Convert between different electrical inductance units including henries, millihenries, microhenries, and nanohenries
IP Address Lookup
Look up information about IP addresses including geolocation, organization, hostname, and network details. Supports both IPv4 and IPv6 addresses.
IP Blacklist Check
Check if an IP address is listed on about 50 DNS-based blacklist (DNSBL) services. Verify email server reputation and check spam, proxy, and malware databases for IPv4 addresses.
IP Subnet Calculator
Calculate IPv4 subnets from CIDR notation or a dotted-decimal netmask — instantly get the network address, broadcast address, usable host range, wildcard mask, IP class, and RFC 1918 / RFC 6598 classification. Divide a network into smaller subnets and compute basic IPv6 prefix ranges (network address, address range, total count) with exact BigInt math. Everything runs locally in your browser.
JPG Compressor
Reduce the file size of JPG images while maintaining visual clarity. Optimize your JPEG files for faster web loading with automatic quality selection.
JPG to AVIF Converter
Convert JPG images to AVIF format for superior compression and quality. Upload your JPG files and download them as AVIF images with up to 50% smaller file sizes.
JPG to PDF Converter
Turn JPG photos into a single PDF document directly in your browser. Reorder images, choose A4, Letter, or fit-to-image pages, and set margins — no uploads and no watermarks.