TmpKit
TmpKit: A free web inbox for quick verification, testing, and temporary message receipt. Ranked #23 of 24 in Disposable Email Services by our editors (6.6/10); pricing: Free plan; best for free browser users wanting extra utilities.
At a glance
- Editor score6.6 / 10
- PricingFree plan
- Best forFree browser users wanting extra utilities
- Free planYes
- Paid fromFree
- Inbox lifetimeHours
- Founded2025
- Facts checked20 Sep 2026
Where it wins
- Instant inboxes without signup, names, or passwords
- Custom prefixes, attachments, browser polling, and API access
- Includes email, DNS, and browser-local developer utilities
Where it doesn't
- Receive-only: no composing or replying to messages
- Short-lived sessions may expire after hours
- Web-only access limits platform coverage
Our verdict on TmpKit
TmpKit is a free, browser-based disposable email service for receiving short-lived messages without an account, name, or password. It is aimed at people who need a temporary inbox for low-risk verification codes, one-time confirmations, spam reduction, or developer and QA testing. Addresses are receive-only, so the service is focused on message receipt rather than ongoing email communication. The web interface also includes email and DNS diagnostics and browser-local utilities for passwords, JSON, UUIDs, and hashing.
The service’s strongest fit is quick, low-commitment use. TmpKit can generate an address instantly, supports custom prefixes, and provides attachment viewing and downloading. Browser polling helps surface incoming messages, while API access extends the service beyond direct browser interaction. These features give it more utility than a basic temporary inbox, particularly for testing workflows and one-off verification tasks. The trade-off is retention: sessions are short-lived, the default mailbox window is 3,600 seconds, and a one-time extension may be available. The live countdown determines the active window.
TmpKit is available on the web and follows a free pricing model, making it suitable for users who want temporary receipt without a subscription decision. Its narrow receive-only design is useful when the goal is to collect a code or confirmation, but it is not a fit for sending replies, maintaining a persistent mailbox, or managing regular email. Choose TmpKit for fast browser-based inboxes, custom address prefixes, attachments, diagnostics, and lightweight developer tools. Choose another service when longer retention, two-way email, or broader platform coverage is essential.
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TmpKit pricing
TmpKit fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Inbox lifetime | Hours |
| Custom address | Yes |
| API access | Yes |
| Custom domain | Not verified |
| Attachments supported | Yes |
| Max active inboxes | Not verified |
| Deployment | Cloud |
| Platforms | Web |
| Support | Email, Docs |
| Built for | Solo, Small business (editorial estimate) |
| Pricing | Free plan |
| Website | tmpkit.com |
| Facts checked | 20 Sep 2026 |
Alternatives to TmpKit
- MailinatorA strong fit for automated inbox testing, with private domains and API-driven workflows.9.2
- Temp Mail APIA developer-focused disposable email service with strong parsing and automation support.9.0
- SecureTempMailA flexible disposable inbox service with automation features and a developer plan.8.8
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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