Base64 Encoder/Decoder
Encode and decode Base64 strings and files with advanced character encoding, batch processing, and conversion history
Base64 Encoder/Decoder handles everyday encoding tasks for text and files. It’s perfect for preparing data URIs, testing webhook payloads, and inspecting attachments.
Key features
- Text encoding and decoding
- File upload with drag & drop
- Image preview and data URL generation
- Multiple output formats (Base64, Data URL)
- Copy and download results
- Real-time conversion with debouncing
- Input validation and error handling
- Keyboard shortcuts and accessibility
How it works
Conversions run locally for speed and privacy. Premium adds batch processing, charset options, URL‑safe toggles, and newline handling so outputs integrate cleanly with external systems.
Step-by-step usage
- Paste text or drop a file.
- Choose encode/decode; (premium) adjust charset and URL‑safe options.
- Copy results or download a file for sharing.
Examples
Encode text
btoa('hello world') → aGVsbG8gd29ybGQ=Decode text
atob('aGVsbG8gd29ybGQ=') → hello worldMake URL‑safe
base64.replace(/\+/g,'-').replace(/\//g,'_').replace(/=+$/,'')Security & privacy
Where applicable, processing runs locally in your browser. Inputs are not logged or sent to external services. Premium features inside the app use Supabase Auth to protect access. For sensitive work, prefer local files and avoid sharing secrets. Outputs include copy and download actions to minimize manual transcription errors.
Accessibility
The tool supports keyboard navigation and screen readers with ARIA labels and descriptive messages. Focus order is logical, and error messages use human‑readable language. These docs maintain proper heading hierarchy and color contrast, and the app version includes skip links and live regions where appropriate.
Limitations & disclaimers
Some advanced capabilities are available only in the DevToolsHub app with a premium plan. The static documentation does not execute code or store inputs. Where behaviors differ across runtimes (browsers, servers, language engines), treat outputs as representative and verify against your production stack when correctness is critical.
Related tools
Explore other DevToolsHub modules that complement Base64 Encoder/Decoder:
- World Clock & Time Zones – World clock with meeting planner & weather integration
- JSON Formatter – Format and validate JSON data
- Regex Tester – Test regex patterns with live matching
- JWT Decoder/Encoder – JWT decode, encode, verify
- Image Compressor – Compress and optimize images
- UUID Generator – Generate unique identifiers
- XPath/CSS Selector Tester – Test XPath and CSS selectors against HTML
- Timestamp Converter – Convert timestamps and dates with timezone support
- Password & Key-like Generator – Generate passwords, passphrases, and key-like strings
- PWA Assets & Manifest Generator – Generate PWA icons and manifest.json