15 tools
Email, Marketing & Creator Tools
Fifteen tools for marketers and creators: preflight an email campaign, test subject lines and preheaders, check email HTML, build signatures and UTM tables, calculate ROAS, CPM and engagement, and plan budgets and content.
About these tools
The email tools check what you control before you press send - headers, unsubscribe support, HTML that email clients can render, subject and preheader length - against the mailbox providers' published sender guidance. Domain authentication (SPF, DKIM, DMARC) needs live DNS, so those checks link to the existing a2z.tools checkers rather than guessing.
The marketing calculators work from your own figures and show every formula. They do not pull platform benchmarks or promise performance; campaign data, lead lists and budgets stay in your browser.
Popular tasks
All Email, Marketing & Creator Tools
- Email Deliverability Preflight Checker Check a campaign before sending: From and Reply-To alignment, List-Unsubscribe and one-click headers, message size, image-to-text ratio, link domains, tracking and plain-text part, against published sender guidelines.
- Email Subject Line Tester Test subject lines for length, mobile and desktop truncation, all-caps and punctuation overuse, spam-filter trigger phrases, personalisation tokens and emoji rendering, and compare variants.
- Email Preheader Preview Builder Preview how sender, subject and preheader appear together in mobile and desktop inbox layouts, and generate the hidden preheader HTML with padding so body text does not leak into the snippet.
- HTML Email Compatibility Checker Scan HTML email code for features with poor email-client support - flexbox, grid, background images, web fonts, SVG, forms, media queries - plus missing alt text, width attributes and Outlook conditional issues.
- Email Signature Generator Create a professional email signature with name, role, contact links, logo URL and social links, as table-based HTML that survives Gmail, Outlook and Apple Mail, with copy and install steps.
- UTM Campaign Builder Generate UTM-tagged URLs in bulk: many landing pages crossed with sources, mediums and content variants, enforced naming conventions, duplicate and case checks, and CSV export for your team.
- Influencer Campaign Cost Calculator Plan an influencer campaign budget from your own quoted rates or CPM: deliverables per creator, expected reach and engagement, usage rights and fees, and the resulting CPM, CPE and cost per click.
- ROAS Calculator Calculate return on ad spend, break-even ROAS from your gross margin, profit after ad cost, and the target ROAS for a profit goal, by channel, with the formulas shown.
- CPM, CPC and CPA Calculator Solve the advertising metrics triangle: enter any known values among cost, impressions, clicks and conversions and get CPM, CPC, CPA, CTR and conversion rate, plus the budget for a target volume.
- Marketing Budget Allocator Split a marketing budget across channels and months by percentage, fixed amounts or target CPA and volume, with seasonality weights, a remaining-budget check and CSV or print output.
- Lead Scoring Calculator Design a lead scoring model: fit and engagement attributes with points, decay and negative scoring, MQL thresholds, then score a CSV of leads and see the distribution before you configure your CRM.
- Social Media Engagement Rate Calculator Calculate social media engagement rate by followers, reach or impressions for one post or many, with the formula each platform convention uses, averages, medians and outlier posts.
- YouTube Title Analyzer Check YouTube titles for length against the 100-character limit, truncation on mobile, search and suggested surfaces, front-loaded keywords, capitalisation and clickbait patterns, and compare variants.
- YouTube Chapter Generator Create YouTube chapter timestamps from your outline, an edit list or subtitle file, and validate them against YouTube's rules - start at 0:00, at least three chapters, ten seconds minimum each.
- Content Calendar Builder Plan a content calendar: channels with posting cadence, themes and campaigns, owners and status, a month or week view with gaps and overloads flagged, and CSV or calendar-file export.
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