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Security report for curl.to

Technology · N/a

Medium risk. 9 critical or high findings in Email security, Security headers and 2 other checks.

Security score

59/100

Risk levelMedium

0–100, higher is better. How it is calculated

curl.to is a specialized developer tool website that provides an online utility for converting curl commands into code snippets in multiple programming languages. It targets developers working with APIs and web services, offering support for languages such as JavaScript, Python, PHP, Go, Ruby, C#, and Java. The site positions itself as a free resource to improve developer productivity by reducing errors and saving time during API development. Technically, the website is built using modern web technologies including React and Next.js, with Google Fonts for typography. The site appears to be moderately optimized for performance and mobile responsiveness, with a clean and professional design. However, accessibility features are basic, and no CMS or hosting provider information is evident from the HTML content. From a security perspective, the site uses HTTPS as indicated by the URL, but no explicit security headers are detected in the HTML content. There are no visible privacy, cookie, or terms of service policies, nor any contact information for security incidents or data protection officers. No analytics or advertising scripts were found, indicating minimal user tracking. The absence of these policies and contact details suggests room for improvement in privacy compliance and security transparency. Overall, the website is safe and professional with a clear focus on developer utility. The lack of privacy and security policies, as well as contact information, lowers its trustworthiness and compliance posture. Strategic improvements in these areas would enhance user trust and regulatory compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
35/ 100 · High
Checks completed
7of 7

NIS2 Art. 21(2)

  1. (a) Risk analysis and security policies: Not visible from outside
  2. (b) Incident handling: One indicator
  3. (c) Business continuity, backups and crisis management: Not visible from outside
  4. (d) Supply chain security: Not visible from outside
  5. (e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
  6. (f) Assessing the effectiveness of security measures: Not visible from outside
  7. (g) Cyber hygiene and security training: Not visible from outside
  8. (h) Cryptography and encryption: Partly checked
  9. (i) HR security, access control and asset management: One indicator
  10. (j) Multi-factor authentication and secured communications: Not visible from outside

This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.

GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.

Priority findings

9 findings rated critical or high. Fix these first.

  1. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

    • Critical

      No email authentication configured

      Domain is vulnerable to email spoofing

      What to do: Implement SPF, DKIM, and DMARC immediately

  2. Security headers

    Security headers are instructions your web server sends to every visitor’s browser. Missing ones leave visitors more exposed to attacks such as clickjacking and injected scripts.

    • High

      Missing X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

    • High

      Missing Content-Security-Policy header

      Controls resources the browser is allowed to load

      What to do: Implement a Content-Security-Policy appropriate for your application

      • ASVS V3.4.3
      • OWASP Secure Headers: OWASP Secure Headers Project recommends Content-Security-Policy: default-src 'self'; form-action 'self'; base-uri 'self'; object-src 'none';…

  3. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

Need hands-on remediation? Email guard@offseq.com

Keep watching curl.to

This scan found 24 issues across 6 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

Daily monitoring

Recommended

€25per month

  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

Email alerts on material changes and an exportable JSON history of every change.

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Full report

€39.90one-time

  • The complete analysis as a PDF you can cite
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Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
75
Security headers
30
Email security
40
DNS health
75
Network security
100
GDPR outside view
35
Average
59

Not counted

  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention curl.to, from OffSeq Breach.

No leaked records found

Breach holds no records for curl.to right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.

Monitor on Breach (opens in a new tab)

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

curl.to operates in the technology sector as a niche developer tool provider. Its business model is based on offering a free online service that converts curl commands into code snippets for various programming languages. The target customers are developers and API consumers who need to translate curl commands into usable code efficiently. The website leverages partnerships and references to reputable curl and developer resources, enhancing its credibility within the developer community. There is no indication of revenue streams such as subscriptions or advertising, suggesting a focus on utility rather than monetization. The site’s small size and focused service offering position it as a specialized tool rather than a broad platform. Growth potential lies in expanding language support, adding integrations, or offering premium features.

Security posture

The current security posture of curl.to is moderate. The site uses HTTPS, which is mandatory for secure communications. However, the absence of security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options reduces protection against common web attacks. No privacy or cookie policies are published, indicating potential compliance gaps with GDPR and other privacy regulations. There is no visible incident response or vulnerability disclosure information, which limits transparency and preparedness for security events. No sensitive data or credentials are exposed in the HTML content. The lack of analytics and tracking scripts reduces privacy risks but also limits insight into user behavior. Overall, the site would benefit from implementing standard security headers, publishing privacy and security policies, and establishing incident response contacts.

Recommendations

  1. Implement and publish a comprehensive privacy policy and cookie policy with GDPR compliance details.
  2. Add standard security headers (Content-Security-Policy, X-Frame-Options, X-Content-Type-Options) to enhance protection.
  3. Provide clear contact information including a security or abuse email address for incident reporting.
  4. Establish and disclose a vulnerability disclosure policy or security.txt file to encourage responsible reporting.
  5. Improve accessibility features to meet WCAG standards and enhance user experience for all users.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Description
curl.to is a free developer tool that helps convert curl commands to code in multiple programming languages. It targets developers working with REST APIs, testing endpoints, or learning to interact with web services. Supported languages include JavaScript, Python, PHP, Go, Ruby, C#, and Java. The tool aims to save time, reduce errors, and improve development workflow.
Key services
curl command to code conversion, API development assistance
Content quality
good
Branding
consistent

Technology

Stack
React, Next.js, JavaScript, Google Fonts
Frameworks
Next.js
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
60/100
Good practices seen
  • No exposed sensitive data in HTML
  • Use of HTTPS implied by URL scheme

Analytics and tracking

Tracking level
minimal
Privacy practices
poor

Advertising

Transparency
poor

Site quality

Design
good
User experience
good
Content relevance
good
Navigation
good
Professionalism
good
Trustworthiness
moderate

Key observations

  1. Website is a developer utility focused on converting curl commands to code.
  2. No privacy, cookie, or terms of service policies found on the site.
  3. No contact emails, phone numbers, or physical addresses are provided.
  4. No security or incident response policies are disclosed.
  5. The site uses modern web technologies including Next.js and React.
  6. No analytics or advertising scripts detected in the HTML content.
  7. External links point to reputable developer resources and tools.
  8. No signs of adult or questionable content.
  9. No WAF or blocking mechanisms detected; content fully accessible.
Technical notes

Notes

The website is built on a modern React and Next.js framework, indicating a contemporary and maintainable codebase. It uses Google Fonts for typography and preloads key assets for performance optimization. The site is mobile responsive and has a clear, user-friendly interface. No CMS or hosting provider details are evident, suggesting a custom or managed hosting environment. Performance is moderate with asynchronous loading of scripts and preloading of images. SEO is supported by appropriate meta tags including description and keywords. Accessibility is basic but could be improved with additional ARIA attributes and semantic HTML. No analytics or third-party tracking scripts were detected, which limits data collection but enhances privacy. Overall, the technical implementation is solid with room for enhancements in accessibility and security.
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

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