Free API Testing Tool — No Limits, No Account Required
RESTK is a completely free API testing tool with no feature limits, no signup walls, and no usage caps. Test REST, GraphQL, and WebSocket APIs with full offline support, encrypted local storage, and a native application that launches in under a second. Every feature is included. No paid tiers gate functionality.
No account required. No credit card. No free trial. Just download and start.
Everything Is Free. Everything Is Included.
There are no paid tiers gating features. No "upgrade to unlock" prompts. No artificial limits designed to push you toward a subscription. Here is everything you get when you download RESTK for free.
Unlimited Requests
Send as many API requests as you want. There is no daily, weekly, or monthly cap. No throttling, no usage meter, no "you have reached your limit" popups.
Unlimited Collections
Create as many collections as you need to organize your APIs. No artificial limits on collections, folders, or workspaces.
Unlimited Environments
Set up environments for development, staging, production, and anything else. Switch between them instantly. No cap on the number of environments or variables.
Full Scripting Engine (Nova Scripts)
Write pre-request and post-response scripts with the Nova scripting engine. Modern JavaScript syntax, async/await, JWT generation, cryptographic operations — all included for free.
All Import Formats
Import from Postman, Insomnia, OpenAPI/Swagger, HAR files, and cURL commands. Migrate your entire workflow from any tool without paying a cent.
Code Generation in 15+ Languages
Convert any request to code in JavaScript, Python, Go, Java, C#, Ruby, PHP, Swift, Kotlin, Rust, and more. The code generation engine runs entirely locally.
Full Offline Functionality
Every feature works without an internet connection. Your collections, environments, scripts, and history are always available, always fast, and never dependent on a server.
AES-256 Encryption
Your data is encrypted at rest using AES-256 encryption with keys stored in your operating system keychain. Enterprise-grade security, completely free.
MCP Integration
Connect AI assistants to your API workflows through the Model Context Protocol. Generate tests, create documentation, and analyze responses — all locally.
No Signup Required
Download RESTK and start testing APIs immediately. No email address, no password, no account creation, no verification step. Just open the app and work.
Free vs "Free" — How RESTK Compares
Many API testing tools advertise a free plan, but the reality is a stripped-down experience designed to push you toward a paid subscription. Here is an honest comparison of what you actually get for free.
| Feature | RESTK Free | Postman Free | Insomnia Free |
|---|---|---|---|
| Unlimited API requests | Unlimited | 1,000/month (free plan) | Unlimited (local only) |
| Collection limit | Unlimited | 25 collections | Unlimited (local only) |
| Environment limit | Unlimited | 5 environments | Unlimited (local only) |
| Team size (free) | N/A (local-first) | 3 users | 1 user |
| Scripting engine | Full (Nova Scripts) | Limited on free plan | Basic plugins |
| Import formats | Postman, Insomnia, OpenAPI, HAR, cURL | OpenAPI, cURL | OpenAPI, cURL, HAR |
| Code generation | 15+ languages | 15+ languages | Limited |
| Offline support | Full (offline-first) | None (cloud required) | Partial |
| Encrypted local storage | AES-256 | No (cloud storage) | No |
| Account required | No | Yes | Yes |
| MCP integration | Included | No | No |
| Cloud storage required | No (optional) | Yes | Yes (for sync) |
Comparison based on publicly available free plan details as of February 2026. All products continue to evolve.
Postman's free plan limits you to 1,000 API calls per month, 25 collections, 5 environments, and 3 team members. Insomnia requires an account for cloud sync and limits collaboration features. Both tools use these restrictions to funnel you toward paid plans starting at $12 to $14 per user per month.
RESTK takes a different approach. The free version is the full version. There is no hobbled free tier designed to frustrate you into upgrading. You get the same features whether you downloaded RESTK yesterday or a year ago.
No Account Required. No Strings Attached.
Download RESTK and start testing APIs in seconds. Not minutes. Not after verifying your email. Not after choosing a plan. In seconds.
Most API testing tools force you to create an account before you can send your first request. They want your email address for marketing. They want to track your usage for analytics. They want you in their funnel so they can upsell you later.
RESTK does not require an account. There is no signup form. There is no "continue with Google" button blocking your workspace. There is no "free trial" countdown timer creating urgency. You download the application, open it, and you are working. Your data is stored locally on your machine, encrypted at rest, and fully under your control.
An account only becomes relevant if you choose to use optional cloud sync for team collaboration. That is a conscious decision you make when and if you need it — not a prerequisite for using the tool.
No Email Required
We do not need your email to let you test APIs
No Credit Card
There is nothing to pay for and nothing to trial
No Free Trial
It is free permanently, not free for 14 days
Why RESTK Is Free
A straightforward explanation of our philosophy and business model.
RESTK is an early-stage product built by developers who were frustrated with the direction of existing API testing tools. We watched Postman remove its Scratchpad feature, force users into cloud accounts, and increasingly restrict free plan capabilities. We watched Insomnia go through ownership changes that disrupted its community. We decided to build something better.
Making RESTK free removes all friction from adoption. Developers can evaluate the tool on its merits without worrying about pricing pages, plan comparisons, or trial expirations. We believe that if we build the best API testing experience, developers will choose RESTK — and when we eventually offer paid team collaboration features, those same developers will bring RESTK into their organizations.
Our commitment is simple: individual developer use of RESTK will always be free. We may introduce paid features for team collaboration, enterprise administration, and advanced sync capabilities in the future. But the core API testing experience — everything you need to build, test, and debug APIs as an individual developer — will never require payment.
Our Promise
- Individual developer use will always be free
- We will never remove free features to push upgrades
- We will never gate core API testing behind a paywall
- We will never sell or monetize your data
- We will never require an account for individual use
Frequently Asked Questions
Common questions developers ask about RESTK being free.
Is RESTK really free?
Yes. RESTK is completely free for individual use with no feature limits, no usage caps, and no time restrictions. Every feature listed on this page — unlimited requests, unlimited collections, Nova scripting, code generation, all import formats, MCP integration, offline support, and encrypted storage — is included at no cost. This is not a free trial. There is no credit card required and no expiration date.
Do I need to create an account to use RESTK?
No. You can download RESTK and start testing APIs immediately without creating an account, providing an email address, or going through any signup process. An account is only needed if you later choose to use optional cloud sync for team collaboration. Individual use never requires an account.
Will RESTK always be free?
Yes, for individual developers. Our commitment is that the core API testing experience — everything you need to build, test, and debug APIs as an individual developer — will always be free. We may introduce paid team collaboration features in the future, but individual use will never be gated behind a paywall. We will not follow the pattern of removing free features to push upgrades.
What is the catch?
There is no catch. RESTK is an early-stage product built by developers who were frustrated with the direction of existing API tools. We are building a community of developers who value performance, privacy, and control. Making the product free removes friction and lets developers evaluate RESTK on its merits. Our business model will eventually include paid team features, but individual developers will never be forced to pay.
How does RESTK make money?
RESTK is currently focused on building the best possible API testing experience and growing our developer community. Revenue will come from optional paid team collaboration features — things like encrypted team sync, role-based access control, shared workspaces, and enterprise administration tools. Individual developers using RESTK for personal or professional work will always have access to the full feature set at no cost.
Learn More About RESTK
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Download RESTK and get the full API testing experience with zero restrictions. No signup, no credit card, no expiration.