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Verify SIREN and SIRET codes using the Luhn Algorithm.
Create countdown timers.
Calculate your monthly net pay including NHIF and NSSF.
Verify a 13-digit NZBN using the GS1 Checksum.
Convert Katha, Chatak, and Decimals (Shotok) to standard units.
CSV to JSON Converter turns CSV data (with a header row) into a clean JSON array of objects, automatically converting numbers and handling quoted fields. Copy the JSON or download it for use in APIs, apps, and config files. It is a fast, private developer tool that runs entirely in your browser with no uploads.
Verify an Australian Business Number using Modulo 89.
Verify a 12-digit Aadhaar using the Verhoeff algorithm.
Convert HEX to RGB.
Convert numbers into words.
Verify the mathematical checksum of a KSA Iqama.
Verify the structure of a Korean Resident Registration Number.
Convert modern international dates to the Ethiopian (Ge'ez) calendar.
Sort Text Lines arranges your lines alphabetically (A–Z or Z–A), numerically, by length, or in random order, with options to remove duplicates and ignore case. It is perfect for organizing lists, keywords, names, and data. The sorting happens instantly in your browser, so your information stays private and there are no limits.
File Converter changes images between JPG, PNG, and WebP and turns images or text files into PDF, all in your browser. It is a fast, private way to switch formats without installing software or uploading your files anywhere.
Convert text to binary and vice versa.
Convert text to spoken words.
Generate QR codes online.
Generate CSS gradients visually.
Pomodoro productivity timer.
Convert your Salaire Brut to Salaire Net.
Calculate your Salário Líquido in Brazil.
Translate Western dates into the traditional Chinese agricultural calendar.
Add or extract tax for 10% standard and 8% reduced rates.