Compress and resize images in bulk with quality control, before/after preview, and ZIP download.

Generate placeholder images with custom dimensions, text, colors, and batch output.

Create QR codes with custom logos, colors, and style randomizer.

Format, validate, explore, and diff JSON data with tree view and large file support.

Compare text or files side by side with highlighted differences.

Generate placeholder text in paragraphs, sentences, or words.

Write and preview Markdown with live rendering.

Encode or decode URL components and full URLs.

Convert text and files to and from Base64.

Convert special characters to HTML entities and back.

Generate or decode HTTP Basic Authentication headers.

Decode and inspect JSON Web Token header, payload, and signature.

Convert between px, rem, em, vw, vh, pt, and more.

Convert colors between HEX, RGB, HSL, and preview them.

Test regular expressions with real-time matching and capture groups.

Comprehensive SEO optimization checklist for web projects.

Generate strong, secure random passwords with custom rules.

Convert date and time between world timezones.

Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text.