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101Tool

Free, browser-based API Studio, PDF optimizer, JSON code generator, and developer conversion toolkit โ€” no signup or installation required.

101Tool is a free, browser-based utility platform for developers and teams who want practical tools without installing an app or creating an account.

Its API Studio supports REST and GraphQL requests, multi-request tabs, Params, Auth, Headers, Body and Tests editing, response inspection, variable extraction, collection runs, Postman Collection and OpenAPI imports, local request history, WebSocket sessions, environment variables, and optional small-team workspace synchronization. Sensitive values can remain device-local.

The PDF Optimizer analyzes and optimizes PDF files in the browser with multiple compression levels while prioritizing readable output and local processing. The Code Generator converts JSON payloads into TypeScript interfaces, Go structs and Python Pydantic models. The Developer Toolkit includes number-base conversion, ASCII tools, color conversion, URL and Base64 encoding, text utilities and hexadecimal helpers.

101Tool offers Korean and English interfaces, responsive layouts, light and dark themes, and detailed technical guides for every major tool. Core utilities are available free of charge with no installation required.

A startup from South Korea that is founded by Jason Lee.

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101Tool

101Tool Reviews and Details

This page is designed to help you find out whether 101Tool is good and if it is the right choice for you.

#Developer Tools #API Management #PDF Tools

Screenshots and images

  • 101Tool
    Image date //
    2026-07-18
  • 101Tool
    Image date //
    2026-07-18
  • 101Tool
    Image date //
    2026-07-18
  • 101Tool
    Image date //
    2026-07-18

Features & Specs

  1. API Studio

    REST, GraphQL, WebSocket, collections, tests and environments

  2. Local PDF Optimization

    Browser-based PDF analysis and multi-level optimization

  3. JSON Code Generation

    TypeScript, Go and Python Pydantic output

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  • Public traffic stats of 101Tool

    Check the traffic stats of 101Tool on SimilarWeb. The key metrics to look for are: monthly visits, average visit duration, pages per visit, and traffic by country. Moreoever, check the traffic sources. For example "Direct" traffic is a good sign.

  • Domain Rating (DR)

    Check the "Domain Rating" of 101Tool on Ahrefs. The domain rating is a measure of the strength of a website's backlink profile on a scale from 0 to 100. It shows the strength of 101Tool's backlink profile compared to the other websites. In most cases a domain rating of 60+ is considered good and 70+ is considered very good.

  • Domain Authority (DA)

    Check the "Domain Authority" of 101Tool on MOZ. A website's domain authority (DA) is a search engine ranking score that predicts how well a website will rank on search engine result pages (SERPs). It is based on a 100-point logarithmic scale, with higher scores corresponding to a greater likelihood of ranking. This is another useful metric to check if a website is good.

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Is 101Tool good? This is an informative page that will help you find out. Moreover, you can review and discuss 101Tool here. The primary details have been verified within the last quarter. So they could be considered up to date. If you think we are missing something, please use the means on this page to comment or suggest changes. All reviews and comments are highly encouranged and appreciated as they help everyone in the community to make an informed choice. Please always be kind and objective when evaluating a product and sharing your opinion.

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