Most Popular Tools

Pretty-print and beautify JSON with custom indentation.

Count words, characters, sentences, and reading time.

Convert text between 11 different letter cases.

Generate downloadable QR codes for any text or URL.

Compare two texts line-by-line with an LCS diff.

Design linear, radial, and conic gradients visually.

Shrink JPEG, PNG, and WebP images without a server.

Create secure passwords with custom length and character sets.

Validate JSON syntax and see detailed error diagnostics.

Convert between Unix timestamps and human-readable dates.

Layer multiple box-shadows with a live preview.

Resize images to exact pixel dimensions with locked aspect ratio.

Encode or decode text to/from Base64, UTF-8 safe.

Generate bulk RFC 4122 v4 UUIDs with formatting options.

Convert colors between HEX, RGB, HSL, HWB, OKLCH and CMYK.

Calculate X% of Y, percent change, and reverse percentages.

Explore JSON as a collapsible, color-coded tree.

Convert length, weight, temperature, area, volume, speed, and data-size units.

Decode a JWT's header and payload, and check expiry.

Compress JSON by removing whitespace and show bytes saved.

Generate SHA-1/256/384/512 hashes of text.

Check WCAG 2.1 contrast ratio between two colors.

Calculate network, broadcast, host range, and mask from an IPv4 CIDR.

Estimate password entropy, crack time, and get actionable advice.