How do I turn on offline responses?

In the survey editor, go to Settings and then General, and switch on Offline responses. That is the only step. The setting travels with the survey when you share the link.

Does turning offline responses on change anything for online respondents?

No. Offline is a safety net, not a mode switch. Respondents with a working connection see exactly the same survey and the same experience. The offline behavior only activates if the network drops.

Do respondents need to install an app?

No. The survey is cached on the device when it loads, so it keeps working through a connection drop with nothing to install and nothing to enable.

What happens to questions that need the internet?

Some question types need a live connection, including payment, wallet, social login, and AI follow-up questions. When you enable offline responses, a notice tells you if your survey contains any. Respondents can still answer everything else offline, and a banner tells them exactly how many questions need a connection to finish.

What if a respondent closes the survey before submitting?

Their progress is saved on the device and encrypted. They can reopen the survey later and continue from where they left off with nothing lost.

How does the response get submitted once the connection returns?

Automatically, with no action from the respondent. Two delivery engines cover the cases: with the tab still open the response delivers on all browsers, and with the tab closed it delivers on Chrome and Edge.

Will I end up with duplicate responses?

No. Each response carries a client response ID that acts as a duplicate guard on the server. Even if both delivery engines fire, the response is stored exactly once, so there are no duplicate records and no wasted distribution codes.

Are offline responses still end-to-end encrypted?

Yes. Answers are encrypted on the device as they are saved, stay encrypted while queued, and land in your results still encrypted. Only you can read them.

Do captcha-protected surveys work offline?

Captcha verification always happens live, so a survey protected by captcha needs a connection at the point of verification. Everything else in the survey still follows the standard offline behavior.

Even When the Connection Drops, the Response Still Reaches You

Flip one setting and your survey keeps working when the network fails. Answers are saved encrypted on the respondent's device, and the moment they are back online the response submits itself. Nobody has to remember anything, and nothing is lost.

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Trusted by leading brands for secure, privacy-first surveys

What Offline Responses Change for the Data You Collect

Every Lost Signal Is a Lost Response. Until Now.
A respondent halfway through a survey when the signal cuts out is a partial record and a wasted contact. On a bad venue network or a rural site that happens constantly, and every one of those responses is paid for but never delivered. Answers saved on the device turn a dropped connection into a delay instead of a loss.
Nobody Has to Remember to Come Back and Resubmit
Asking a respondent to return later and finish is asking for a response you will not get. When the queued answer sends itself the moment the network returns, completion no longer depends on anyone remembering anything. The fieldwork you paid for arrives without a single follow-up chase.
Zero Duplicates. Zero Cleanup. Zero Wait.
Retry logic that fires twice creates duplicate records, burned distribution codes, and hours of dataset cleaning before analysis can start. A duplicate guard on submission means the same response cannot land twice, so the data reaching your dashboard is ready to work with immediately.

How Offline Surveys Work in BlockSurvey

Turn On Offline Responses
In the survey editor, go to Settings and then General, and switch on Offline responses. If your survey includes questions that need a live connection, such as payment, wallet, social login, or AI follow-up, a notice tells you which ones. Everything else still works offline. Publish and share the link as usual. The setting travels with the survey.
They Keep Answering, Signal or Not
The survey is cached on the device, so it stays usable through a connection drop. Every answer is saved on the device and encrypted as they go, and a banner reassures them their answers are safe. If any question needs a connection, a second banner names exactly how many.
Responses Submitted Offline, Safely Queued
The finished response is encrypted and queued on the device. The respondent is told it is safe and that it will send itself, so nobody has to come back and resubmit later.
It Syncs Itself Back, Exactly Once
The moment the network returns, the queued response is delivered automatically with no action from the respondent. Two delivery engines cover every browser, and a client response ID acts as a duplicate guard on the server, so the response is stored exactly once with no duplicate records and no wasted distribution codes. It lands in your results still encrypted, readable only by you.

Where Offline Responses Save the Data You Would Otherwise Lose

Field Researchers — Interviews Beyond Reliable Coverage
Household surveys and rural fieldwork run through patchy coverage all day. Enumerators keep working through the dead zones, answers save encrypted on the device, and the day's responses deliver themselves once the team is back in range.
NGOs and Development Programs — Monitoring in Low-Connectivity Regions
Program monitoring and beneficiary feedback happen in exactly the regions where infrastructure is weakest. Field officers collect on schedule regardless of the network, and nothing depends on a respondent or an officer remembering to resubmit later.
Events and Conferences — Venues Where Wifi Collapses
Conference wifi buckles the moment a few thousand attendees connect at once. Session feedback and exit surveys keep collecting through the congestion, and the queued responses deliver themselves as the floor clears.
Retail and Hospitality — Stockrooms, Basements and Dead Zones
In-store audits and staff surveys still need to happen in the parts of a building where signal disappears. The audit runs the same everywhere, and nothing is lost moving between the shop floor and the storeroom.
Trade Shows and Pop-Ups — Saturated Venue Networks
Trade show floors are notorious for saturated networks and paid wifi that fails when it matters. Booth teams capture visitor feedback continuously, and every queued response syncs on its own once the network recovers.
Public Health and Community Outreach — Mobile Units and Clinics
Mobile health units and outreach clinics operate in locations chosen for population need, not network quality. Intake forms and assessments keep running, with every response encrypted on the device until it delivers itself.

Pricing

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What people say

Join 500+ happy customers worldwide who are already using our amazing product.

Beyond Surveys—A Truly Multi-Purpose Tool

This platform goes far beyond basic surveys. I’ve used it for lead generation, landing page enrichment, and even embedded videos. Everything’s easy to use, well documented, and super flexible—whether you're building forms, quizzes, or something more advanced.

Martin G.Créateur de la Méthode Rashōmon

UI/UX is great and fast API processing

I think BlockSurvey is good for short and long surveys. What I find the best is the fact that there are so many templates I can use and customize.

Ankit M.AI Analyst Team Lead

AI form builder for top security and data privacy

Uses end-to-end encryption technology that allows users to create survey forms where data is secure and private. UI looks very beautiful.

Lou F.Creative Visionary

Nothing Like It — BlockSurvey Is in a League of Its Own!

From end-to-end encryption-level security and AI-generated questions to powerful logic flows and white-label domains, BlockSurvey has it all. It’s secure, innovative, and packed with features like calculations, templates, and in-app analytics. I use it to create personalized assessments for leadership training—nothing else compares.

Kim B.Founder/ President - International Leadership Trainer

Survey and Forms for Privacy and Security

BlockSurvey puts privacy and security above anything else. The use of end-to-end encryption is not a gimmick as in many products; it's a core feature enabling privacy and security. The survey building tools are impeccable. I've used numerous SaaS survey tools, and nothing comes close.

Trevor L.Chief Information Security Officer (CISO)

Effortless and Secure Data Collection with Web3 Touch

BlockSurvey is very user-friendly with amazing customization options. It makes capturing data simple and secure. While the Web3 space still has room to mature, the platform itself is smooth and intuitive.

Ali S.Founder, Small- Business

Unmatched Security & Stunning Response Rates

Few tools combine data confidentiality and form aesthetics like this one. The conversational design improved my response rate by 43%, and the webhook integrations made syncing to our CRM effortless. I also love how responsive and community-driven the support team is.

Kris R.Group Automation Manager

Powerful custom surveys

Creating surveys with BlockSurvey has been a breeze. The drag-and-drop interface is intuitive, and we’re able to collect data anonymously and securely—without intermediaries. It’s interactive, friendly, and encourages high participation while protecting user privacy. The reports are solid, and we’ve used it confidently for internal and external feedback.

Liz D.IT Support Specialist

Private, Beautiful Surveys That Build Trust

For our NGO, data privacy is everything—and this platform nails it. It keeps personal info fully protected while letting us design beautiful, chat-like surveys that increase engagement. Team collaboration features sealed the deal.

Luis Noel D.Director Comercial

Recognized by the People Who Use Us

Join Leading Brands across 50+ countries

Using BlockSurvey to protect their respondents' privacy, increase their survey completion rates, get better community feedback, and build better organizations.

G2 Crowd

4.8Star Rating

Capterra

4.9Star Rating

Secure by Design - It's for Everyone

Security isn't an afterthought for us; it's a cornerstone. BlockSurvey meets and exceeds industry-leading standards, including ISO 27001, SOC2, FERPA, HIPAA and GDPR, to keep your data safe.

Frequently asked questions

: In the survey editor, go to Settings and then General, and switch on Offline responses. That is the only step. The setting travels with the survey when you share the link.
: No. Offline is a safety net, not a mode switch. Respondents with a working connection see exactly the same survey and the same experience. The offline behavior only activates if the network drops.
: No. The survey is cached on the device when it loads, so it keeps working through a connection drop with nothing to install and nothing to enable.
: Some question types need a live connection, including payment, wallet, social login, and AI follow-up questions. When you enable offline responses, a notice tells you if your survey contains any. Respondents can still answer everything else offline, and a banner tells them exactly how many questions need a connection to finish.
: Their progress is saved on the device and encrypted. They can reopen the survey later and continue from where they left off with nothing lost.
: Automatically, with no action from the respondent. Two delivery engines cover the cases: with the tab still open the response delivers on all browsers, and with the tab closed it delivers on Chrome and Edge.
: No. Each response carries a client response ID that acts as a duplicate guard on the server. Even if both delivery engines fire, the response is stored exactly once, so there are no duplicate records and no wasted distribution codes.
: Yes. Answers are encrypted on the device as they are saved, stay encrypted while queued, and land in your results still encrypted. Only you can read them.
: Captcha verification always happens live, so a survey protected by captcha needs a connection at the point of verification. Everything else in the survey still follows the standard offline behavior.

Stop Losing Responses to a Bad Connection

Join 500+ companies across 50+ countries who collect survey data wherever their respondents are, connection or not.

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14-day free trial
AI-powered insights
End-to-end encrypted

Even When the Connection Drops, the Response Still Reaches You

What Offline Responses Change for the Data You Collect

Every Lost Signal Is a Lost Response. Until Now.

Nobody Has to Remember to Come Back and Resubmit

Zero Duplicates. Zero Cleanup. Zero Wait.

How Offline Surveys Work in BlockSurvey

Turn On Offline Responses

They Keep Answering, Signal or Not

Responses Submitted Offline, Safely Queued

It Syncs Itself Back, Exactly Once

Where Offline Responses Save the Data You Would Otherwise Lose

Field Researchers — Interviews Beyond Reliable Coverage

NGOs and Development Programs — Monitoring in Low-Connectivity Regions

Events and Conferences — Venues Where Wifi Collapses

Retail and Hospitality — Stockrooms, Basements and Dead Zones

Trade Shows and Pop-Ups — Saturated Venue Networks

Public Health and Community Outreach — Mobile Units and Clinics