# Developer Tools 91 Developer Tools on FindUtils. Online developer tools -- JSON formatter, regex tester, API utilities, code converters, and more. No signup. Most tools keep input in your browser; proxy and lookup tools say what leaves on their page. FindUtils offers developer tools that run in your browser, covering the languages and data formats each page names. From JSON formatters and API testing utilities to regex testers, diagram editors, and code converters, most tools process your input locally; the HTTP Request Builder, Webhook Tester, GitHub Dev Card, WVW Store Checker and UML editor send what they need to a server, and each says so on its page. Whether you need to format a JSON response, generate TypeScript types from a schema, check an OpenAPI spec's structure, design a UML diagram, or convert between curl commands and code, these utilities remove the need for desktop installations. Popular tools include the JSON Formatter with syntax highlighting, Base64 Encoder/Decoder, Regex Tester with live matching, and SQL Formatter supporting multiple dialects. To pull text, Markdown or JSON with page positions out of a PDF, use the PDF Text Extractor, which now lives on the PDF Tools hub at findutils.com/pdf/pdf-text-extractor/ and still runs in your browser. FindUtils.com is not the GNU findutils package. - [Load Balancer Design Tool](https://findutils.com/developers/loadbalancer-design/) - [JSON Formatter](https://findutils.com/developers/json-formatter/) - [JSON Escaper](https://findutils.com/developers/json-escaper/) - [JSON to URL Params](https://findutils.com/developers/json-to-url-params/) - [JSON Path Finder](https://findutils.com/developers/json-path-finder/) - [JSON to Form](https://findutils.com/developers/json-to-form/) - [Form to JSON Schema](https://findutils.com/developers/form-to-json-schema/) - [JSON Schema Form Builder](https://findutils.com/developers/json-schema-form-builder/) - [HTML Formatter](https://findutils.com/developers/html-formatter/) - [Unix Timestamp](https://findutils.com/developers/unix-timestamp/) - [Base64 Encoder](https://findutils.com/developers/base64-encoder/) - [CSS Minifier](https://findutils.com/developers/css-minifier/) - [SQL Formatter](https://findutils.com/developers/sql-formatter/) - [JWT Decoder](https://findutils.com/developers/jwt-decoder/) - [ULID & NanoID Generator](https://findutils.com/developers/id-generator/) - [URL Parser](https://findutils.com/developers/url-parser/) - [Cron Expression Generator](https://findutils.com/developers/cron-expression-generator/) - [Regex Tester](https://findutils.com/developers/regex-tester/) - [Markdown Previewer](https://findutils.com/developers/markdown-previewer/) - [JSON YAML Converter](https://findutils.com/developers/json-yaml-converter/) - [YAML Validator](https://findutils.com/developers/yaml-validator/) - [XML Formatter](https://findutils.com/developers/xml-formatter/) - [Code Screenshot Generator](https://findutils.com/developers/code-screenshot-generator/) - [JSON to TypeScript](https://findutils.com/developers/json-to-typescript/) - [Knap Template Renderer](https://findutils.com/developers/knap-template-renderer/) - [JSON to Liquid](https://findutils.com/developers/json-to-liquid/) - [JSON to Zod Schema](https://findutils.com/developers/json-to-zod-schema/) - [JSON to Go Struct](https://findutils.com/developers/json-to-go-struct/) - [JSON to Java Class](https://findutils.com/developers/json-to-java-class/) - [JSON to Python Class](https://findutils.com/developers/json-to-python-class/) - [JSON Schema Validator](https://findutils.com/developers/json-schema-validator/) - [JSON Schema Generator](https://findutils.com/developers/json-schema-generator/) - [JSON Diff](https://findutils.com/developers/json-diff/) - [cURL to Code](https://findutils.com/developers/curl-to-code/) - [JSON Faker](https://findutils.com/developers/json-faker/) - [JQ Playground](https://findutils.com/developers/jq-playground/) - [OpenAPI Validator](https://findutils.com/developers/openapi-validator/) - [Swagger to OpenAPI](https://findutils.com/developers/swagger-to-openapi/) - [GraphQL Schema Validator](https://findutils.com/developers/graphql-schema-validator/) - [GraphQL to TypeScript](https://findutils.com/developers/graphql-to-typescript/) - [Postman to cURL](https://findutils.com/developers/postman-to-curl/) - [HAR to cURL](https://findutils.com/developers/har-to-curl/) - [API Docs Generator](https://findutils.com/developers/api-docs-generator/) - [JSON to PDF Renderer](https://findutils.com/developers/json-to-pdf-renderer/) - [Visual JSON Editor](https://findutils.com/developers/visual-json/) - [Chmod Calculator](https://findutils.com/developers/chmod-calculator/) - [Glob Pattern Tester](https://findutils.com/developers/glob-pattern-tester/) - [HTML Entity Finder](https://findutils.com/developers/html-entity-finder/) - [3D Rotation Visualizer](https://findutils.com/developers/3d-rotation-visualizer/) - [ER Diagram Designer](https://findutils.com/developers/er-diagram-designer/) - [State Machine Designer](https://findutils.com/developers/state-machine-designer/) - [System Architecture Diagram Designer](https://findutils.com/developers/architecture-diagram/) - [WVW Apps.json Generator](https://findutils.com/developers/wvw-apps-json-generator/) - [UML Diagram Editor](https://findutils.com/developers/uml-diagram-editor/) - [WVW Store Checker](https://findutils.com/developers/wvw-store-checker/) - [ASCII Diagram Generator](https://findutils.com/developers/ascii-diagram-generator/) - [Markdown Table to Image](https://findutils.com/developers/markdown-table-to-image/) - [AI Model Picker](https://findutils.com/developers/ai-model-picker/) - [dnpm Configurator](https://findutils.com/developers/dnpm-configurator/) - [Yolobox Configurator](https://findutils.com/developers/yolobox-configurator/) - [x402 Config Generator](https://findutils.com/developers/x402-config-generator/) - [Cloudflare Cost Calculator](https://findutils.com/developers/cloudflare-cost-calculator/) - [Code Diff Checker](https://findutils.com/developers/code-diff-checker/) - [Yoyo Component Generator](https://findutils.com/developers/yoyo-component-generator/) - [Yoyo Config Generator](https://findutils.com/developers/yoyo-config-generator/) - [Yoyo Loading State Builder](https://findutils.com/developers/yoyo-loading-state-builder/) - [Claude Code Usage Analyzer](https://findutils.com/developers/claude-code-usage-analyzer/) - [Crypto Testnet Faucets](https://findutils.com/developers/crypto-testnet-faucets/) - [LLM System Requirements Calculator](https://findutils.com/developers/llm-requirements-calculator/) - [A2UI Lab](https://findutils.com/developers/a2ui-lab/) - [SQLite Browser](https://findutils.com/developers/sqlite-browser/) - [SQLite Diff](https://findutils.com/developers/sqlite-diff/) - [GitHub Dev Card](https://findutils.com/developers/github-dev-card/) - [Tailwind to StyleX Converter](https://findutils.com/developers/tailwind-to-stylex/) - [Webhook Tester](https://findutils.com/developers/webhook-tester/) - [HAR Viewer](https://findutils.com/developers/har-viewer/) - [Env Linter](https://findutils.com/developers/env-linter/) - [Env JSON Converter](https://findutils.com/developers/env-json-converter/) - [JSON TOML Converter](https://findutils.com/developers/json-toml-converter/) - [Properties JSON Converter](https://findutils.com/developers/properties-json-converter/) - [INI JSON Converter](https://findutils.com/developers/ini-json-converter/) - [YAML TOML Converter](https://findutils.com/developers/yaml-toml-converter/) - [Env YAML Converter](https://findutils.com/developers/env-yaml-converter/) - [Env Diff](https://findutils.com/developers/env-diff/) - [Env Merge](https://findutils.com/developers/env-merge/) - [TOML Diff](https://findutils.com/developers/toml-diff/) - [Plist JSON Converter](https://findutils.com/developers/plist-json-converter/) - [HTTP Request Builder](https://findutils.com/developers/http-request-builder/) - [Cron to systemd](https://findutils.com/developers/cron-to-systemd/) - [PEM Decoder](https://findutils.com/developers/pem-decoder/) - [GraphQL Playground](https://findutils.com/developers/graphql-playground/) ## Also on FindUtils These do related work and live at another address on FindUtils, so they are not counted above. - [AI Agent Starter Guide](https://findutils.com/ai-agent-starter-guide/) - [PDF Text Extractor](https://findutils.com/pdf/pdf-text-extractor/)