Email Spam Trap Checker
Flag the addresses that look like traps before you send.
All Tools
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Invoice CSV Formatter
Fix an invoice CSV: delimiters, quoting, encoding, dates and amounts.
Invoice XML Formatter
Format or minify invoice XML — UBL and CII included — with comments kept.
Invoice Splitter
Split a batch of invoices into separate files — by customer, by month or one each.
Invoice Merger
Merge several invoices into one consolidated invoice, or into one combined data file.
Invoice Parser
Parse an invoice into structured fields and see exactly how each one was found.
Invoice Billing Address Validator
Check a billing address is complete and correctly formed for its country, before it is invoiced.
Invoice EIN Validator
Check US Employer Identification Numbers on invoices and W-9s, in bulk.
Word Invoice Template
Download a real .docx invoice you can edit in Word, Docs or LibreOffice.
Graphic Design Invoice Generator
Bill design work with concepts, revisions, artwork and usage rights itemised.
Hotel Invoice Generator
A hotel folio with nights, room rate, city tax and extras itemised.
HTML Color Names Chart
All 148 CSS colour names, searchable and sortable.
Text Color on Background
Work out whether black or white text belongs on any colour.
Alpha Blend Calculator
Work out the solid colour a translucent layer really produces.
AI Image Size Calculator
Find the right resolution for SDXL, FLUX, DALL-E or Midjourney at any aspect ratio.
Prompt Template Builder
Fill a prompt template from spreadsheet rows and get one prompt per row.
Gold Weight Converter
Bhori, ana, roti, tola and grams — with carat purity and a price per bhori.
HTML to BBCode Converter
Turn a web page or rich text into BBCode a forum will accept.
HEX to CMYK Converter
HEX colour codes to CMYK percentages — one colour or a whole palette.
Force Converter
Convert newtons, kilonewtons, kgf, lbf, dynes and kips in one table.
PSD to PNG Converter
Open a Photoshop file without Photoshop and save it as PNG, JPEG or WebP.
M4A to MP3 Converter
Turn Apple M4A and AAC audio into MP3 that plays on anything.
CSV Delimiter Converter
Swap between comma, semicolon, tab and pipe — and fix comma decimals while you are there.
Relative Time Calculator
Work out the gap between two dates, in every unit including working days.
ISO 8601 Converter
Convert a date into every ISO 8601 form, including week and ordinal dates.
IEEE 754 Converter
See a float’s sign, exponent, mantissa and its exact decimal value.
Fake Data Generator
Generate realistic test rows in JSON, CSV or SQL from fields you choose.
Cron Expression Parser
Read a cron expression in plain English and see when it next runs.
CSS Units Converter
Convert between px, rem, em, pt, %, vw and vh with the right context.
Glassmorphism Generator
Build a frosted glass panel with backdrop blur, over a real background.
Cookie Parser
Parse Set-Cookie and Cookie headers, and check the security flags.
HTTP Status Codes
Every HTTP status code, searchable, with what it actually means.
Punycode Converter
Convert internationalised domain names to punycode and back.
Data URI Generator
Turn text, SVG or a small file into a data: URI you can inline anywhere.
Hex to Base64
Convert a hexadecimal string to Base64, standard or URL-safe.
Base32 Encoder & Decoder
Encode and decode Base32, including the Crockford and hex variants.
TOML to JSON
Convert a TOML config to JSON, with tables and arrays of tables resolved.
XML Minifier
Strip whitespace and optionally comments from XML, and see the bytes saved.
XML Validator
Check XML is well-formed and find the exact tag that breaks it.
JSON to Kotlin Data Class
Generate Kotlin data classes with Gson or kotlinx.serialization annotations.
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