Free online tools

Format, minify, validate, and escape JSON online.

Convert Unix timestamps and dates in seconds or milliseconds.

Encode and decode Base64 with UTF-8 support.

Encode and decode URLs and special characters.

Generate MD5, SHA1, SHA256, and SHA512 hashes locally.

Convert between binary, octal, decimal, hex, and bases 2-36.

Generate UUID v4 values in batches with format options.

Test regular expressions with real-time highlighting.

Count characters, words, lines, and Chinese characters.

Deduplicate lines, remove blanks, and clean spaces.

Convert text to uppercase, lowercase, title case, or sentence case.

Convert Simplified and Traditional Chinese with OpenCC.

Compare two texts line by line and highlight differences.

Calculate mortgage payments, interest, and total repayment.

Calculate salary income tax and after-tax income.

Convert length, weight, temperature, area, and volume units.

Generate QR codes from text or URLs and download PNG.

Generate CODE128, EAN13, and other barcodes.

Compress PNG, JPG, and WEBP images locally.

Convert RGB, HEX, HSV, and HSL colors with a picker.