# Hex to text - Human page: https://happytails.ai/en/developer-tools/hex-to-text/ - Markdown: https://happytails.ai/en/developer-tools/hex-to-text.md - Structured JSON: https://happytails.ai/agents/en/developer-tools/hex-to-text/index.json - Visibility: public ## Tool capabilities | Property | Value | | --- | --- | | Tool ID | `hex-to-text` | | Category | developer-tools | | Implementation | Registered implementation. Registration alone is not a production-quality guarantee. | | Browser execution | Automatic updates after valid input or file selection. | | Browser processing | Browser; see tool notes for network behavior. | | HTTP API | /api/v1/tools/hex-to-text/run | | Browser-agent interface | run_current_tool | ### Inputs and settings Text input: Hexadecimal bytes. Example or placeholder shown in the interface (not a validated fixture): ```text 48 69 ``` Separate byte values from 00 to FF with spaces or commas. Results update as you type. Up to 1,000,000 characters. No additional settings are declared for this tool. ### HTTP contract API calls process supplied data on the server. The website origin is `https://happytails.ai`. Server API hosting is not connected on the public website yet. Use your local server origin to test these requests. ```http POST https://happytails.ai/api/v1/tools/hex-to-text/run Content-Type: application/json ``` [Detailed operation reference](https://happytails.ai/en/api/tools/hex-to-text.md) ยท [Shared API guide](https://happytails.ai/en/api.md) #### Limits | Limit | Value | | --- | --- | | request_bytes | 8388608 | | input_characters | 1000000 | | files_bytes | 5242880 | | max_files | 0 | | timeout_seconds | 12 | #### Complete input schema ```json { "type": "object", "additionalProperties": false, "properties": { "input": { "type": "string", "maxLength": 1000000, "default": "", "description": "Plain text input. File tools use files instead unless otherwise documented." }, "options": { "type": "object", "additionalProperties": false, "properties": {} } } } ``` #### Complete output schema ```json { "type": "object", "required": [ "tool", "result" ], "properties": { "tool": { "type": "string" }, "result": { "type": "object", "required": [ "text", "files" ], "properties": { "text": { "type": [ "string", "null" ] }, "data": { "description": "Parsed JSON when the textual result is JSON." }, "name": { "type": "string" }, "mime": { "type": "string" }, "files": { "type": "array", "items": { "type": "object", "required": [ "name", "mime", "bytes", "base64" ], "properties": { "name": { "type": "string" }, "mime": { "type": "string" }, "bytes": { "type": "integer" }, "base64": { "type": "string", "contentEncoding": "base64" } } } } } } } } ``` #### Error and retry handling Failures return a non-200 status and `error.code` plus `error.message`. Correct invalid input before retrying; retry server-busy responses with bounded backoff. Returned files contain Base64 data, not persistent download URLs. Decode and inspect the output before treating conversion as successful. See the shared API guide for the complete status and timeout rules. ### Browser-agent workflow 1. Open the human page in a browser that supports WebMCP. 2. Discover the interface exposed by that page; use its actual schema. 3. Select files on the page first when the tool requires files. 4. Call `run_current_tool` with valid input and settings. 5. Inspect the returned result or error and the displayed output. Retrieve files from the displayed download links. Calls do not automatically copy or download results. Browser permissions still apply. Interface availability alone is not proof of successful execution. ### Planning specification Validate even byte pairs and encoding; combine reverse conversion as a mode. This describes intended requirements. Use the implementation notes, interface schema and observed output to determine current support. ### Complete machine-readable capability record ```json { "id": "hex-to-text", "category": "developer-tools", "built": true, "requirements": "Validate even byte pairs and encoding; combine reverse conversion as a mode.", "implementation": { "fields": [], "experience": { "automatic": true, "single": false, "label": "Hexadecimal bytes", "placeholder": "48 69", "help": "Separate byte values from 00 to FF with spaces or commas. Results update as you type. Up to 1,000,000 characters.", "action": null }, "mode": "automatic", "interactive": false }, "execution": "POST /api/v1/tools/hex-to-text/run", "api": { "id": "hex-to-text", "name": "Hex to text", "category": "developer-tools", "description": "Decode hexadecimal byte values into UTF-8 text.", "notes": "", "human_path": "/en/developer-tools/hex-to-text/", "method": "POST", "endpoint": "/api/v1/tools/hex-to-text/run", "schema_url": "/api/v1/tools/hex-to-text", "input_schema": { "type": "object", "additionalProperties": false, "properties": { "input": { "type": "string", "maxLength": 1000000, "default": "", "description": "Plain text input. File tools use files instead unless otherwise documented." }, "options": { "type": "object", "additionalProperties": false, "properties": {} } } }, "output_schema": { "type": "object", "required": [ "tool", "result" ], "properties": { "tool": { "type": "string" }, "result": { "type": "object", "required": [ "text", "files" ], "properties": { "text": { "type": [ "string", "null" ] }, "data": { "description": "Parsed JSON when the textual result is JSON." }, "name": { "type": "string" }, "mime": { "type": "string" }, "files": { "type": "array", "items": { "type": "object", "required": [ "name", "mime", "bytes", "base64" ], "properties": { "name": { "type": "string" }, "mime": { "type": "string" }, "bytes": { "type": "integer" }, "base64": { "type": "string", "contentEncoding": "base64" } } } } } } } }, "processing": "Server; same transformation code as browser tools", "limits": { "request_bytes": 8388608, "input_characters": 1000000, "files_bytes": 5242880, "max_files": 0, "timeout_seconds": 12 } }, "agent_processing": "Server; same transformation code as browser tools", "browser_agent": { "supported": true, "name": "run_current_tool", "discovery": "WebMCP on the human page in a supporting browser", "verification": "See audit/API-AUDIT.md; availability is not verification" } } ``` ## Page guide Decode hexadecimal byte values into UTF-8 text. ## Useful next steps - [Base64 encoder decoder](https://happytails.ai/en/developer-tools/base64-encoder-decoder/): Encode/decode tabs. ([Markdown](https://happytails.ai/en/developer-tools/base64-encoder-decoder.md)) - [URL encoder decoder](https://happytails.ai/en/developer-tools/url-encoder-decoder/): Encode or decode a URL component. ([Markdown](https://happytails.ai/en/developer-tools/url-encoder-decoder.md)) - [JWT decoder](https://happytails.ai/en/developer-tools/jwt-decoder/): Decode header/payload locally. ([Markdown](https://happytails.ai/en/developer-tools/jwt-decoder.md)) ## How to use Hex to text 1. Enter hexadecimal bytes in the input field. 2. The result updates as you type. Adjust the available settings if needed. 3. Review the result, then use Copy result or a download link when available. ## What to expect Decode hexadecimal byte values into UTF-8 text. Separate hexadecimal byte values with spaces or commas. Each value must be between 00 and FF. Invalid UTF-8 is rejected.