Developer Tools Collection

Clean, validate, and beautify your JSON data instantly.

Convert between Unix timestamps and date-time values.

Encode/decode Base64 for text and files.

Encode and decode URL or URI content.

Decode JWT headers and payloads locally.

Test regex patterns and preview matches in real time.

Generate MD5, SHA-1, SHA-256, and SHA-512 digests.

Create QR codes from text or URLs.

Decode QR content from uploaded images.

Length, area, mass, volume, temperature, speed, pressure, power, energy, data, bitrate, timestamps, and radix — many outputs from one input.

Convert JSON to YAML, XML, CSV, and TypeScript types.

Count words, characters, and paragraphs in your text.

Generate passwords, tokens, and random identifiers.

Search meanings of HTTP status codes quickly.

Encode and decode strings with common algorithms.

Convert HEX, RGB, HSL, and CMYK color formats.

Encode/decode HTML entities safely.

Compress image files with adjustable quality.

Convert between PNG, JPEG, and WebP formats.

Generate custom placeholder image files.

Add signature overlays and basic annotations.

Open, edit, and export worksheet data.

Generate placeholder text by words, sentences, or paragraphs.

Build schedules, read plain-language descriptions, and preview next run times (5- or 6-field, presets).