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Free AI with Structured Output (JSON)

We've analyzed all major AI tools to find which ones offer structured output (json) for free. Here are 31 top options you can start using right now without a credit card.

ChatGPT

OpenAI

Versatile conversational AI for everyday work

1.8B / mo estimated traffic
Free / $20/mo
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Claude

Anthropic

Advanced reasoning and nuanced long form analysis

140M / mo estimated traffic
Free / $20/mo
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Google Gemini

Google

Multimodal AI integrated into Google Workspace

420M / mo estimated traffic
Free / $19.99/mo
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DeepSeek

DeepSeek AI

Open weights reasoning model for complex computation

310M / mo estimated traffic
100% Free
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GitHub Copilot

GitHub

AI pair programmer integrated into popular IDEs

82M / mo estimated traffic
Free / $10/mo
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Llama

Meta

Open-source large language model family

5M / mo estimated traffic
100% Free
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NotebookLM

Google

Gemini Notebook — research grounded in your sources

12M / mo estimated traffic
Free / $19.99/mo
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Kiro

Amazon

Spec-driven agentic IDE, CLI, web, and mobile

3.2M / mo estimated traffic
Free / $20/mo
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CodeRabbit

CodeRabbit

Agentic AI code review for pull requests, IDE, and CLI

2.8M / mo estimated traffic
Free / $24/mo
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Replit

Replit

Browser IDE and Agent that publishes full-stack apps

11M / mo estimated traffic
Free / $20/mo
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Warp

Warp

AI terminal, agent CLI, and cloud software factories

4.2M / mo estimated traffic
Free / $20/mo
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n8n

n8n

Source-available workflow automation with AI agents

5M / mo estimated traffic
Free / $22/mo
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Groq

Groq

Fast LPU inference API, playground, and Whisper STT

3.5M / mo estimated traffic
100% Free
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Whisper

OpenAI

Open-weight speech recognition from OpenAI

8M / mo estimated traffic
100% Free
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Otter.ai

Otter.ai

AI meeting notes, live transcription, and Otter Chat

8M / mo estimated traffic
Free / $16.99/mo
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Zapier

Zapier

No-code automation, agents, and 9,000+ app connections

18M / mo estimated traffic
Free / $19.99/mo
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Genspark

Genspark

All-in-one AI workspace for search, dashboards, and agents

4M / mo estimated traffic
100% Free
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Fireflies.ai

Fireflies.ai

Meeting recorder, transcripts, AskFred, and conversation intel

5.5M / mo estimated traffic
100% Free
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Fathom

Fathom

AI meeting notes, bot-free capture, and Ask Fathom

3.2M / mo estimated traffic
100% Free
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LangChain

LangChain

Open agent framework plus LangSmith for test, deploy, and govern

6M / mo estimated traffic
100% Free
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Replicate

Replicate

Run and fine-tune public models via API

5M / mo estimated traffic
100% Free
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Linear

Linear

Issue tracker with agents, MCP, and Linear Agent

4.5M / mo estimated traffic
Free / $10/mo
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ClickUp

ClickUp

Projects, docs, chat, and Brain agents in one workspace

20M / mo estimated traffic
100% Free
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Asana

Asana

Work graph, AI Teammates, and MCP for human-agent teams

25M / mo estimated traffic
100% Free
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Make

Make

Visual automation scenarios across thousands of apps

8M / mo estimated traffic
100% Free
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Figma

Figma

Collaborative design canvas with Figma AI, Make, and MCP

80M / mo estimated traffic
Free / $16/mo
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Amazon Bedrock

Amazon

AWS platform for foundation models, agents, and Guardrails

6M / mo estimated traffic
100% Free
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Azure OpenAI Service

Microsoft

OpenAI models on Azure with enterprise identity and networking

5M / mo estimated traffic
100% Free
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Vertex AI

Google

Google Cloud agent platform, Model Garden, and Gemini API

4M / mo estimated traffic
100% Free
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Deepgram

Deepgram

Speech-to-text, Flux TTS, and a Voice Agent API

1.5M / mo estimated traffic
100% Free
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AssemblyAI

AssemblyAI

Speech-to-text, Voice Agent API, and speech understanding

1.8M / mo estimated traffic
100% Free
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