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Technical References Technical standards

Technical References and Standards

WebToolsHUB tools are built from public standards and authoritative sources. This page lists the APIs, specifications and libraries behind each category.

Updated: Categories: 7

Image and Video Processing

Image compression, cropping, social-grid slicing and video conversion use browser capabilities; supported data stays local.

  1. Canvas API（MDN） — Image drawing, scaling and export:https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API
  2. WebP encoding specification (Google) — Lossy/lossless image encoding standard:https://developers.google.com/speed/webp
  3. HTMLCanvasElement.toBlob / toDataURL（MDN） — Image export API:https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/toBlob
  4. HTML Video element and MediaStream (MDN) — Video frame capture:https://developer.mozilla.org/en-US/docs/Web/HTML/Element/video

Stream Playback

M3U8/HLS playback and RTMP/HTTP-FLV streaming use web standards and established open-source players.

  1. HTTP Live Streaming（RFC 8216，Apple） — HLS protocol specification:https://datatracker.ietf.org/doc/html/rfc8216
  2. Web Media API（MDN） — Audio/video playback capabilities:https://developer.mozilla.org/en-US/docs/Web/Media
  3. hls.js — HLS browser player:https://hls-js.netlify.app/
  4. Video.js — HTML5 video playback framework:https://videojs.com/
  5. flv.js（bilibili） — HTTP-FLV live playback in browsers:https://github.com/bilibili/flv.js
  6. RTMP protocol (Adobe RTMP Specification 1.0) — Real-time messaging protocol:https://www.adobe.com/content/dam/Adobe/en/devnet/rtmp/pdf/rtmp_specification_1.0.pdf

Document Conversion

PDF, Markdown and Word processing follows the relevant format specifications and open-source parsers.

  1. PDF.js（Mozilla） — PDF parsing and rendering engine:https://mozilla.github.io/pdf.js/
  2. ISO 32000-1（PDF 1.7） — PDF document format standard:https://opensource.adobe.com/dc-acrobat-sdk-docs/pdfstandards/PDF32000_2008.pdf
  3. CommonMark — Markdown parsing specification:https://spec.commonmark.org/
  4. Office Open XML（ECMA-376） — DOCX document format standard:https://ecma-international.org/publications-and-standards/standards/ecma-376/

Calculations and Cryptography

Tax, CIDR, unit conversion and cryptography tools use stated official rates and public algorithm standards.

  1. State Taxation Administration — Current tax rates and special additional deduction policy:https://www.chinatax.gov.cn/
  2. RFC 1321（MD5） — Message digest algorithms:https://www.rfc-editor.org/rfc/rfc1321
  3. FIPS 197（AES） — Advanced Encryption Standard:https://csrc.nist.gov/pubs/fips/197/final
  4. RFC 4648（Base64） — Base16/Base32/Base64 data encoding:https://www.rfc-editor.org/rfc/rfc4648
  5. RFC 4632（CIDR） — CIDR network addressing:https://www.rfc-editor.org/rfc/rfc4632
  6. HTML entities (WHATWG) — Character reference table:https://html.spec.whatwg.org/multipage/named-characters.html
  7. International System of Units (BIPM) — Unit conversion base:https://www.bipm.org/en/measurement-units

Speech Tools

Speech-to-text and text-to-speech tools use browser Web Speech capabilities.

  1. Web Speech API（MDN） — Speech recognition and synthesis:https://developer.mozilla.org/en-US/docs/Web/API/Web_Speech_API
  2. SpeechSynthesis（MDN） — Text-to-speech API:https://developer.mozilla.org/en-US/docs/Web/API/SpeechSynthesis

Productivity and Storage

Task lists, whiteboards and similar tools use browser storage to save data locally.

  1. Web Storage API（MDN） — localStorage / sessionStorage：https://developer.mozilla.org/en-US/docs/Web/API/Web_Storage_API
  2. IndexedDB（MDN） — Structured data storage in browsers:https://developer.mozilla.org/en-US/docs/Web/API/IndexedDB_API

Notes and Disclaimer

These references guide implementation. Policy-based tools such as tax calculators may change when official rules change; official institutions remain authoritative. The tools provide general information, not professional advice.