Subject Line Generator — 10 Scored Lines by Goal & Industry
Who this is for: For the blank-composer moment: you know the email, you just need ten honest starting points that already pass the spam checks.
Pick a goal and industry — get 10 ready-to-send subject lines, each scored, with a reroll for fresh sets.
Quick answer: Pick a goal and industry, get 10 scored subject lines instantly — 'Should I send the checklist?' (71) for cold outreach, 'Say hello to the new dashboard' (72) for announcements. Deterministic and free: same settings, same ten lines.
| Output | 10 scored lines per run |
|---|---|
| Goals | Newsletter · promo · cold · announcement |
| Industries | E-commerce · SaaS · services · local · creator |
| Deterministic | Same seed → same 10 lines (bookmarkable) |
| Typical scores | 65–73 out of the box; edit one noun for 80+ |
| Status | Rules follow public email-marketing benchmark practice (2026): ~35–70 visible characters by client, 175-word spam trigger list, sentence case, one clear idea per line. Client truncation figures are engineering approximations — devices, fonts and zoom shift them. |
How does the subject line generator work?
Ten template families per goal — newsletter, promo/sales, cold outreach, announcement — filled with industry-appropriate nouns and scored by the same engine as the tester. Every output is deterministic: the same goal, industry and reroll seed always produce the same ten lines, so you can bookmark a set you liked. The generator writes short lines on purpose — most land in the 60s and 70s out of the box ('Should I send the checklist?' scores 71, 'Say hello to the new dashboard' 72) — and each one shows its score so you know which to fix before sending.
Common uses
- Breaking the blank-page freeze with ten concrete starting points
- Filling a campaign calendar with tested-shape lines fast
- Teaching juniors the shape of a good line by example
- Generating a set per segment and letting scores pick the finalists
Frequently Asked Questions
Are the generated subject lines free to use?
Why do generated lines score in the 60s and 70s rather than 90s?
What's the difference between the four goals?
Can I generate in my industry's voice?
Does the reroll give endless new lines?
More guides
What actually makes a subject line catchy — the five mechanisms, with scored examples for each and the cheesy line to avoid.
A working library of scored subject line examples by scenario — welcome, promo, event, re-engagement, announcement — with the check each one passes.
The 175-word spam trigger list, explained: the 107 that should never appear, the 68 that are fine alone — and why words matter less than they used to.
More Writing & scoring tools
Paste a subject line — get a 0–100 score, client truncation previews, and the exact fixes that raise it.
Paste your line — see which of the 46 power words it hits, by emotion category, with usage notes.