Free online tools for data and code
Free AI Data Analyst
Upload several CSV files at once and ask as many questions as you like, in plain language. The agent joins your tables, writes and runs the queries, and shows every step it took, so you can check the answer instead of trusting it.
Open free data analystJSON Formatter & Validator
Format, validate and inspect JSON, with the exact position of any syntax error.
Open tool →Regex Tester & Pattern Debugger
Live match highlighting, plus a plain-language breakdown of every part of a pattern.
Open tool →SQL Query Formatter & Beautifier
Turn one-line SQL into readable, consistently indented query text.
Open tool →CSV Converter: to JSON, SQL and Excel
Convert CSV to JSON, SQL INSERT statements or Excel, delimiters detected for you.
Open tool →Cron Expression Generator & Parser
Build a cron schedule, or read back what an existing expression really does.
Open tool →Unix Timestamp & Epoch Converter
Unix timestamps to readable dates and back, across units and time zones.
Open tool →Diff Checker: Compare Text and Code
Compare two versions of a text or file and see every change highlighted.
Open tool →Text Case Converter & Cleaner
Switch between camelCase, snake_case and friends, and tidy the text on the way.
Open tool →URL Encoder & Decoder
Percent-encode and decode URLs and query parameters, safely and correctly.
Open tool →Base64 Encoder & Decoder
Decode and encode Base64, including the URL-safe variant, without leaving the page.
Open tool →Watch explai answer one real business question
A recording of the product itself. At the top, the question someone types in: roll a promotion that grew revenue 12% out across all European stores. Below it, explai's answer: it checks that claim against the real sales data, shows every reasoning step, and comes back with a chart and a clear recommendation against the rollout. Under 10 seconds, starts by itself, nothing to click.
That was one question, on our data. In measured deployments teams save about three hours per person a day, and a week of repeatable analysis comes back in roughly five minutes. A private sandbox is waiting for your data: upload a CSV and ask your first question in a few minutes.
Small tools save minutes. Real analysis saves weeks.
explai is an AI data agent that runs the whole analysis: root causes, forecasts, and every answer cited back to your own numbers. The same instant-answer feeling as these tools, on your business data.