Tools
Utilities that run in your browser. Format and fix JSON, convert JSON to CSV, clean CSV, hash email addresses, and generate DKIM keys — without uploading a file.
Flatten nested JSON or NDJSON into columns and download a CSV. Nothing is uploaded.
JSONPretty-print, minify, validate, and sort keys. Paste or open a file. Nothing is uploaded.
JSONRepair trailing commas, comments, single quotes, and unquoted keys into strict JSON.
CSVTrim cells and standardize dates, numbers, and booleans. Download a UTF-8 CSV.
MailSHA-256, SHA-1, SHA-512, MD5 for Gravatar, and HMAC. The address never leaves this tab.
MailRSA key pair, DNS TXT record, and PEM files generated in the browser.
API dumps, tokens, mail keys, and address lists should not go to a random upload form. Each tool here runs in the tab you already have open. Convert nested payloads with JSON to CSV, repair JS-style objects with the JSON fixer, or pretty-print with the JSON formatter.