Free email marketing tools
Every check, preview and fix you run before you hit send — free, and running entirely in your browser. No signup to use them, and nothing is uploaded. Sign in only if you want to save your work.
Subject line tester
LiveScore any subject line — length, spam words, emoji and cut-off points.
Subject line bank
Live50+ subject line ideas — swap in your brand, favourite and test.
Preheader optimiser
LiveThe most underused space in the inbox, done properly.
Inbox preview
LiveSee it across Gmail, Outlook and Apple Mail before you send.
Read time & readability
LiveWord count, reading ease and estimated read time.
Plain-text generator
LiveClean plain-text version of any HTML email, for deliverability.
Spam checker
LiveScore spam-trigger words, caps and links in your content.
Send-time optimiser
LiveThe right send window for your audience and email type.
List & data cleaner
LiveDedupe, normalise and validate your list — in your browser.
Case converter
LiveBulk lowercase, UPPERCASE, Title and Sentence case for data.
First & last name splitter
LiveSplit a column of full names into first and last name.
UTM builder
LiveTrackable links with email best-practice defaults.
Why these tools are free
Most email tools make you sign up, upload your campaign to a US server, and pay before you can even see a result. Mailfois does the opposite: every tool here runs in your own browser, so your subject lines, copy and lists never leave your device. Use them as much as you like, no account required.
When you want the tools to remember you — save your reports, store your brand defaults, reopen past campaigns — that's when you create a free account. And the full pre-send checker bundles these checks into one readiness score before you send.