The Terlido toolbox
A better starting point
for your next campaign.
Check your setup. Clean your list. Make the numbers add up. Practical tools, free to use, with no account required.
57 tools ready to use
Deliverability
Domain email health checker
Check SPF, DKIM, DMARC, MX and public blocklists together, with plain-English explanations and fixes.
Live check
Planning and calculators
Cold email sending volume calculator
Estimate first touches and total email capacity while reserving room for warmup and follow-ups.
Runs in your browser
Planning and calculators
Mailbox and domain calculator
Estimate mailboxes and domains needed for a weekly first-touch target.
Runs in your browser
Planning and calculators
Email warmup schedule calculator
Build an editable daily ramp from a starting volume to a target volume.
Runs in your browser
Planning and calculators
Campaign duration calculator
Estimate working days to complete a sequence with reserved follow-up capacity.
Runs in your browser
Planning and calculators
Cold email ROI calculator
Model revenue, contribution, cost, and return from your own conversion assumptions.
Runs in your browser
Planning and calculators
Sales funnel calculator
Project replies, meetings, and deals from explicit stage conversion rates.
Runs in your browser
Planning and calculators
Reply rate calculator
Calculate human and positive reply rates against delivered messages.
Runs in your browser
Planning and calculators
Bounce rate calculator
Calculate bounced messages as a share of attempted sends.
Runs in your browser
Planning and calculators
Cold email A/B significance calculator
Compare two reply or meeting rates with confidence intervals and a two-sided z-test.
Runs in your browser
Planning and calculators
A/B sample size calculator
Estimate equal group sizes for a two-sided comparison of two conversion rates.
Runs in your browser
Planning and calculators
Time zone sending planner
Find UTC send windows for a recipient's local workday on a specific date.
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Planning and calculators
Outreach cost calculator
Add mailbox, platform, data, and labor costs for a monthly plan.
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Planning and calculators
Lead scoring worksheet
Score a lead against criteria and weights you define yourself.
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List preparation
Email list duplicate remover
Deduplicate CSV rows by normalized email address and download the cleaned CSV.
Runs in your browser
List preparation
Email list format checker
Review CSV structure, empty addresses, and basic email syntax without contacting mail servers.
Runs in your browser
List preparation
CSV campaign import checker
Check mapped email and personalization columns before import.
Runs in your browser
List preparation
Email address extractor
Extract unique addresses from pasted text for local review.
Runs in your browser
List preparation
Email permutator
Generate common unverified address patterns from a name and domain.
Runs in your browser
List preparation
Disposable email checker
Compare an email domain with a pinned, maintained public blocklist.
Runs in your browser
List preparation
Role-based email detector
Flag generic inbox prefixes in a pasted list.
Runs in your browser
List preparation
LinkedIn search query builder
Build copyable Google search queries for public LinkedIn profiles without scraping.
Runs in your browser
Link builders
WhatsApp link generator
Build a click-to-chat URL with an optional prefilled message.
Runs in your browser
Link builders
Mailto link generator
Build an encoded email link with optional subject and body.
Runs in your browser
Link builders
UTM builder
Add campaign attribution parameters to a destination URL.
Runs in your browser
Deliverability
SPF checker
Inspect a published SPF record and its recursive DNS lookup budget.
Live check
Deliverability
SPF record generator
Create a proposed SPF TXT record from explicit sender inputs.
Live check
Deliverability
SPF lookup limit checker
Trace SPF DNS lookups against the 10-lookup limit.
Live check
Deliverability
DKIM selector checker
Check a specific DKIM selector and explain its published key state.
Live check
Deliverability
DMARC checker
Inspect DMARC policy, alignment and report addresses.
Live check
Deliverability
DMARC record generator
Prepare a DMARC policy record for review.
Live check
Deliverability
MX lookup
Show a domain's mail exchanger records.
Live check
Deliverability
Email blocklist checker
Check a bounded set of named public blocklists.
Live check
Deliverability
BIMI checker
Inspect BIMI DNS publication and logo URL.
Live check
Deliverability
MTA-STS checker
Inspect MTA-STS DNS and policy publication.
Live check
Deliverability
TLS report record generator
Create a proposed TLS-RPT DNS record.
Live check
Deliverability
Reverse DNS checker
Check PTR and forward matching for a public IP.
Live check
Deliverability
Bulk sender readiness
Review live DNS and your sending practice against Google's published sender guidance.
Live check
Email content
Email content checker
Review advisory wording and formatting signals.
Runs in your browser
Email content
Subject line tester
Check subject length, prefixes and promotional wording.
Runs in your browser
Email content
Subject line preview
See approximate short and wide inbox previews.
Runs in your browser
Email content
Email CTA checker
Spot unclear or competing asks in a draft.
Runs in your browser
Email content
Spintax tester
Check Terlido spintax and preview repeatable variants.
Runs in your browser
Email content
Mail merge preview
Render a small sample CSV with Terlido template syntax.
Runs in your browser
Email content
Email signature generator
Create a simple accessible text and HTML signature.
Runs in your browser
Email content
HTML email to plain text
Convert HTML to readable text with link destinations.
Runs in your browser
Email content
Email size checker
Measure raw HTML and text byte size.
Runs in your browser
Email content
Email accessibility checker
Review common HTML email accessibility issues.
Runs in your browser
Email diagnostics
DMARC XML report analyzer
Summarize aggregate DMARC XML reports locally.
Runs in your browser
Email diagnostics
Email header analyzer
Read received-mail headers and authentication claims.
Runs in your browser
Email diagnostics
DMARC alignment checker
Compare header domains under relaxed or strict alignment.
Runs in your browser
Domain diagnostics
SMTP connection tester
Test a domain's public mail exchanger for an SMTP greeting on port 25.
Live check
Website & utilities
Website SEO checker
Inspect a public page's title, description, canonical, headings and search directives. See the actual tags, without an invented SEO score.
Live check
Website & utilities
Meta tag generator
Create escaped title, description, canonical and social preview tags to copy into your page's HTML head.
Runs in your browser
Website & utilities
Text cleaner & counter
Clean extra spaces, remove repeated lines, change case and count words or characters. Your text stays in this browser.
Runs in your browser
Website & utilities
QR code generator
Create a scannable QR code for a link or text and download it as PNG or SVG. Generated entirely in your browser.
Runs in your browser
Website & utilities
Image resizer & converter
Resize an image and export JPEG, PNG or WebP in your browser. Choose dimensions and quality without uploading your file.
Runs in your browser