JSON to Excel Converter
JSON records into a formatted .xlsx — nested keys flattened, dates typed, filters on.
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Excel to JSON Converter
A spreadsheet as JSON records — header row as keys, real dates, one sheet or all of them.
CSV to Excel Converter
Make a real .xlsx from CSV — typed columns, frozen header, filters, no import wizard.
MAC Address Formatter
Reformat a MAC address between every notation, and decode what it means.
Regex Cheatsheet
Every regex token, searchable, with an example of what it matches.
Basic Auth Generator
Build an HTTP Basic Authorization header from a username and password.
TSV to JSON
Convert tab-separated data — or a spreadsheet paste — straight into JSON.
CSV to XML
Convert CSV rows into XML records with named root and row elements.
INI to JSON
Convert an INI or config file into structured JSON, sections and all.
JSON to TOML
Turn a JSON object into a TOML document with proper tables and arrays of tables.
YAML to JSON
Convert YAML config into JSON and see exactly how each value was typed.
JSON to XML
Convert JSON into XML, with control over attributes, arrays and the root element.
JSON to Query String
Serialise a JSON object into a percent-encoded URL query string.
JSON Schema Generator
Infer a draft-07 JSON Schema from a sample document in one step.
JSON Unflattener
Rebuild nested JSON from flat dot-notation or bracket-notation keys.
JSON Escape & Unescape
Turn any text into a JSON string literal, or unwrap one back to plain text.
JSON Viewer
Explore a JSON document as a collapsible tree with paths you can copy.
Commission Calculator
Commission earned, flat rate or tiered, with splits.
IRR Calculator
Internal rate of return and NPV from any cash flow series.
Mutual Fund Calculator
Fund growth after expense ratios and sales loads.
IRA Calculator
Traditional against Roth, compared on an after-tax basis.
Boat Loan Calculator
Boat payment plus the running costs people forget to budget.
Real Estate Calculator
Property returns: cap rate, cash-on-cash, equity and total profit.
Target Heart Rate Calculator
Training zones from maximum or heart rate reserve.
Compound Interest Calculator
Grow a balance with regular contributions and any compounding frequency.
Loan Calculator
Monthly repayment, total interest and a full amortisation schedule.
Tile Calculator
Tiles, boxes, grout and adhesive for any area.
Voltage Drop Calculator
Voltage drop over a cable run, against the 3% limit.
Heat Index Calculator
Apparent temperature from heat and humidity, with risk levels.
Density Calculator
Density, mass or volume, solving for whichever is missing.
Schema Markup Generator
Generate JSON-LD structured data for rich results.
Robots.txt Generator
Build a valid robots.txt with per-crawler rules in a minute.
Brand Voice Generator AI
A voice guide your whole team can write from, AI or instant.
Social Media Link Generator
Turn usernames into a full set of profile URLs at once.
YouTube Engagement Rate Calculator
Work out YouTube engagement rate against views, with like and comment rates.
WhatsApp Marketing Link Generator
A wa.me link that opens a chat with your number, pre-filled.
Email Typo Checker
Catch gmial.com, yahooo.com and every near miss.
Invoice PDF Merger
Merge invoice PDFs into one file, in the order you choose, without uploading them.
Invoice Tax ID Validator
Check any tax number on an invoice — VAT, GSTIN, ABN, EIN, PAN or IBAN — against its own rule.
Invoice Duplicate Checker
Find duplicate invoices in a list before you pay one of them twice.
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