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Free tool by Jubayer Labs · runs locally in your browser
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Analyze email
Jubayer Labs / Free tool 01

Cold email
risk analyzer
built for senders.

Check spam triggers, subject line risks, readability, formatting, and cold email best practices before you send. Runs entirely in your browser. No accounts, no uploads.

This tool evaluates content related risks only. It does not guarantee inbox placement.

Analyze my emailSee how it works
0
Emails stored
6
Trigger categories
120+
Curated phrases

Inbox Signal by Jubayer Labs. Content risk only. Inbox placement also depends on domain authentication (SPF, DKIM, DMARC), sender reputation, sending volume, list quality, and recipient engagement.

Private analysis — runs in your browser, nothing is stored.
Email type
0
Words
0
Characters
0
Links
0
Questions
0
Triggers
Workspace

Ready to Analyze

Paste your subject line and email body to review content risks, structure, readability, personalization, and cold email best practices.

  • Subject-line analysis
  • Trigger phrase detection
  • CTA evaluation
  • Personalization checks
  • Readability metrics
  • Score breakdown
–

Your report will appear here

Paste a subject line and email body, then click Analyze Email. We'll score content risk, highlight risky phrasing, and suggest fixes.

This tool evaluates content-related risks only. It does not guarantee inbox placement.

Panel 01

Email health summary

Cold Outreach
  • Subject length—
  • Body length0 words
  • CTA count—
  • Links0
  • Questions0
  • Reading time—
  • Personalization—
Panel 02

Personalization variables

No personalization variables detected. Add {{first_name}} to make the email feel written for one person.
Panel 03

Quick fixes

Run the analysis to see prioritized fixes here.

Trusted by teams
sending B2B cold email.

Try it free
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Apollo
HubSpot
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Smartlead
Section / How it works

Three moves.
One cleaner send.

  1. 01

    Paste

    Drop in your subject line and body. Everything stays inside this browser tab, nothing is uploaded.

  2. 02

    Analyze

    The rule based engine scores urgency, overpromise, shady, promotional, financial, and aggressive triggers.

  3. 03

    Improve

    Click any highlight for a plain explanation plus two or three safer alternatives you can drop in.

Section / Use cases

Built for real
outreach workflows.

01Workflow

Pre-send QA

Check subject lines, triggers, formatting and variables before uploading a campaign.

02Workflow

B2B cold outreach review

Review message clarity, personalization and CTA structure before launch.

03Workflow

Follow-up cleanup

Catch repetitive language, pressure wording and broken variables before sending.

Section / Checklist

The 10 point
cold email checklist.

Run the analyzer above to convert this into a live scorecard for your draft.

0/10static preview
  • 01
    Clear sender identity
    Recipient can tell who you are from the sign off.
  • 02
    Honest subject line
    No fake Re, Fwd, or misleading claim.
  • 03
    Relevant business context
    The email explains why you are writing this specific person.
  • 04
    One reasonable CTA
    A single, low friction next step. Not three.
  • 05
    Valid merge tags
    All personalization tokens render correctly.
  • 06
    No deceptive claims
    Skip guaranteed outcomes and absolute promises.
  • 07
    Sparse links
    Ideally zero or one link in the first email.
  • 08
    Opt out wording
    A soft line like reply STOP and I will drop you.
  • 09
    Readable structure
    Short paragraphs, no long walls of text.
  • 10
    Restrained urgency
    No countdowns, deadlines or pressure language.
Section / Scope

What this checker can
and cannot do.

✓

What it evaluates

  • Spam trigger phrases
  • Subject line structure
  • Readability and pacing
  • CTA clarity and count
  • Personalization variables
  • Cold email best practices
✕

What it cannot verify

  • Real inbox placement
  • Sender reputation
  • Domain reputation
  • Blocklist status
  • Live SPF or DKIM pass
  • Recipient engagement
Check your email DNS
Jubayer Labs / Free tool 02

Content is only one part
of deliverability.

Check your domain's SPF, DKIM, DMARC, MX and other email DNS records before launching a campaign. A clean draft still needs a healthy sending domain to land.

Check email DNSLearn about cold email infrastructure

FAQs

Analyze my email
Does this tool guarantee inbox placement?

No. Inbox Signal only scores content risks. Real deliverability depends on SPF, DKIM, DMARC, sender reputation, sending volume, list quality, and recipient engagement.

Is my email content stored?

No. Analysis runs entirely inside your browser tab. Nothing is sent to a server, saved to a database, or logged in analytics.

Can it check SPF, DKIM and DMARC?

Not yet in this tool. The upcoming Jubayer Labs DNS Checker will handle SPF, DKIM, DMARC, MX and sending domain configuration.

What is the difference between content risk and DNS health?

Content risk is what you wrote — words, structure, formatting. DNS health is how your sending domain is configured. Both matter. A clean email from a broken domain still fails.

Does it support non English emails?

The trigger dataset is English only for now. Structural checks such as length, links, CTAs, and readability work for any Latin script text.

Can a clean email still go to spam?

Yes. Domain reputation, IP reputation, past complaint rates, list quality, and volume patterns can all route a perfectly written email to spam.

How do you decide what is a spam trigger?

A curated dataset of phrases well known in the cold email community, grouped by category and severity. Rule based, not AI.

Beyond content

Content is only one part
of deliverability.

Check your email infrastructure next. Review SPF, DKIM, DMARC, MX and sending domain configuration before launching a campaign.

Check email DNSExplore Jubayer Labs