Subject Line Tester
See exactly where phones and desktops cut it off, and catch the merge tag you forgot to replace before everyone reads “Hi [FIRST_NAME]”.
Clarity & Ask Check
Finds your ask and tells you how far in it is. Readability, buried requests, passive voice and jargon with plain-English swaps.
Email Tone Checker
The email you reread four times. See which phrases make it land sharp, hedged or over-apologetic — underlined, not guessed at.
AI Slop Detector
Find the stock openers, corporate padding and assistant leftovers that make a message read machine-written — and get a cleaned version back.
Invisible Character Remover
Strip the zero-width spaces and byte-order marks that ride along when you paste out of an AI chat window. See exactly where they were.
Pre-Send Check
The whole gate: leaked API keys and PII, attachments and links you promised but didn't include, empty subjects, AI phrasing — per platform.
They cost us nothing to run
Presend's first layer is deterministic and local — no model call, no server. Putting it on a public page costs exactly as much as serving the HTML.
Your text never leaves the page
Nothing you type is transmitted anywhere — there is no upload and no API call. The only request these pages make is for the web font, before you have typed a word. Turn off your wifi and they still work.
Three of them are the actual product
The slop detector, character remover and pre-send check load the same engine files the extension ships — a verdict there is the verdict you'd get in your compose window. The three writing tools are web-only for now. What none of them can do is show up uninvited.
The check only helps if it runs
A tool on a web page needs you to remember it. Presend stands in the compose window on Gmail, Outlook, Slack, LinkedIn and X, and holds the send when something looks wrong.
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