What are the best free AI tools?

OpenDesk offers 127 free AI tools including an AI slides maker, AI resume builder, PDF tools, image generator, code agent, SEO and writing tools.

Is there a free AI tool to create presentations?

Yes — OpenDesk's AI Slides Maker generates full presentations from a prompt for free.

What is the best free AI tool for coding?

OpenDesk's AI Code Agent generates, refactors and explains code across major languages, free to start.

Are SEO AI tools free?

OpenDesk includes 10 free AI-powered SEO tools for keyword ideas, meta tags, content briefs and on-page audits.

Yes — 5 generations per tool per day with no signup. Create a free account for unlimited generations, saved history, and cross-device sync. Paid plans unlock team workspaces, priority queue, and API access.

What output format do I get?

Plain text, formatted for readability. Copy, download, or share via link.

Where does my data go?

API Request Builder runs 100% client-side using your browser's compute. Files and text never leave your device — safe for confidential material.

Can I share my output?

Yes — click *Share Setup* to copy a deep link that pre-fills the same inputs for the next person. Output itself can be copied, downloaded, or printed to PDF.

What if I hit the free limit?

Sign in (free) for unlimited generations on every tool. Or check /tools — over 120 tools cover the same task in different ways.

Back to All Tools

API Request Builder

Developer

Build, test, and document API requests with a visual interface.

Instant · runs in your browserUnlimited free use · no signup

Input

API URL*

Method

Headers (JSON)

Request Body

Output

Fill in the fields and click Generate to see results here

What API Request Builder does differently

Produces an instant, locally computed report for api request builder.
Deterministic api request builder engine — same input always yields the same output.
Controls: API URL · Method · Headers (JSON) · Request Body — each one changes the result meaningfully.
Handles large payloads without freezing the tab (chunked, worker-friendly).
Descriptive error messages with line/column pointers when input is malformed.

Technical spec

RuntimeInstant (in-browser)

PrivacyInput never leaves your device

OutputReport + copyable code

Typical time< 50ms

Developer

Pairs well with

Code GeneratorAI-powered code writing

Code ExplainerUnderstand any code

Code DebuggerFind and fix bugs

SQL Query GeneratorGenerate SQL queries

Regex GeneratorCreate regex patterns

JSON FormatterFormat and validate JSON

How to use API Request Builder

1
Open the tool
Go to API Request Builder — no signup required for your first 5 generations per tool. Sign in for unlimited use, saved history, and team sharing.
2
Fill in 1 required field
The required input is API URL. Click Try Example to autofill realistic sample data.
3
Tune optional settings
Refine the output with Method, Headers (JSON), Request Body. Selectors offer curated presets that match common use cases.
4
Generate
The output is computed instantly in your browser — nothing is uploaded to a server.
5
Export & share
Copy, download (.txt), print to PDF, or hit Share Setup to send a pre-filled link to a teammate. Last 10 generations are saved locally; sign in to sync across devices.

Pro tips

Be specific in your inputs — vague prompts produce vague output. For API Request Builder, naming concrete numbers, brand names, or constraints lifts quality dramatically.
Because API Request Builder runs entirely in your browser, your data never leaves your device. Safe to use with confidential material.
Combine API Request Builder with other OpenDesk tools — chain output into Writer Studio, SEO Studio, or Open Pilot for richer workflows.