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Email Text Case Converter

Quick case converter for email-specific copy editing. Sentence case for subject lines (recommended), Title Case for headings, lowercase for casual.

Sentence case (recommended for subject lines)
Quick question about acme's new outbound process
Title Case
Quick Question About Acme's New Outbound Process
lowercase
quick question about acme's new outbound process
UPPERCASE
QUICK QUESTION ABOUT ACME'S NEW OUTBOUND PROCESS
What it does

Standard case-conversion algorithms with smart handling of short words (Title Case keeps 'a', 'an', 'the' lowercase).

When to use

Subject line editing. Standardizing copy across email templates.

FAQ

Sentence case or Title Case for subject lines?+

Sentence case. Outsolvi 2026 data shows 3-5% reply-rate lift over Title Case — title case reads as marketing email.

Keep going

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Converter ran. Now track what happens after you hit send.

Most senders convert formatting and move on. Outsolvi tracks what the recipient actually does with that converted email — opens (confidence-scored, not fake), clicks, replies, forwards. From $7/user/mo yearly.

Track the next send

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Nate SummersCo-Founder, Outsolvi

Nate built Outsolvi after watching every email-tracking tool he had ever used lie to him about opens. Outsolvi runs Tier 1 to 5 confidence scoring on every open, native in Outlook and Gmail, so the number on the dashboard is one a rep can actually act on.

Last reviewed May 25, 2026Editorially independent

We update these pages when the underlying mechanics change — new mailbox-provider rules, new tracker behavior, new measurement gaps. The dates above are real revisions, not auto-touches.

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