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Encoding, URL & Unicode Studio

UTF-8 Base64 & Base64URL encoder/decoder, local file Data URI builder, interactive URL & query-param editor, HTML entity/JSON string escaper, and Unicode/Hex/Binary byte inspector.

100% Local Browser Engine · Zero Uploads3 Workspaces

Base64, URL Query & HTML Entities: UTF-8 safe Base64 & Base64URL codec, drag-and-drop File → Data URI generator, URL query parameter editor, and HTML entity encoder/decoder.

Plain UTF-8 Text
Base64 Output
60 bytes
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What is Encoding, URL & Unicode Studio?

Encoding, URL & Unicode Studio brings together UTF-8 safe Base64/Base64URL encoding, drag-and-drop File → Data URI conversion, interactive URL & query-parameter editing, HTML entity escaping, and Unicode code-point / UTF-8 hex & binary inspection.

How to use Encoding, URL & Unicode Studio in 3 steps
  1. 1

    Pick Codec mode or Unicode UTF-8 Inspector

    Paste text, URLs, Base64 strings, or drop a local asset.

  2. 2

    Inspect decoded output or byte streams

    Edit URL query keys in a visual table or examine U+XXXX code points and UTF-8 hex bytes.

  3. 3

    Copy clean output

    Copy encoded strings, Data URIs, or JS \u{} escapes.

Key features and benefits
  • Handles multi-byte emoji, Arabic, and CJK strings cleanly via TextEncoder/TextDecoder.
  • Shows exact UTF-8 byte length vs JavaScript UTF-16 string.length side by side.
Common use cases

Debugging webhook callback URLs with nested query parameters.

Diagnosing mojibake, zero-width characters, and multi-byte emoji encodings.

Why browser-based works better

Encoding, URL & Unicode Studio consolidates related developer & code studios workflows into one cohesive, multi-mode browser studio — eliminating tab-hopping across fragmented single-purpose tools.

Every mode executes locally using Web APIs and audited client-side libraries, so private files, tokens, and source code never leave your device.

You might also need

Continue this workflow with nearby browser-based tools so you can validate, convert, and ship output without context switching.

Encoding, URL & Unicode Studio FAQs

Quick answers about the workflow, privacy, and where this tool fits in a broader job.

Why does '🚀'.length equal 2 in JavaScript?

JavaScript strings use UTF-16 code units (surrogate pairs for astral planes), while UTF-8 encodes 🚀 in 4 bytes.

Related free tools

Keep the workflow moving with nearby tools that solve the next likely step.

Built and maintained by

Free AI Tools Engineering Team

Browser Tooling & Web Platform Engineering

Last updated:

Tested in Chrome, Firefox, and Safari on desktop and mobile.

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