Base64 Encoder / Decoder

How to use the base64 encoder / decoder

Choose encode or decode and the alphabet. Paste text or upload a file to encode. When decoding binary data, download the decoded bytes instead of viewing them as text.

Supported features and limitations

Base64 is encoding, not encryption. Text inputs support up to 200,000 characters and uploaded files up to 1 MB. Decoded text must be valid UTF-8.

Related tools

JWT Decoder

• Meta Tag Generator — Generate escaped SEO, Open Graph and Twitter card tags from your page details.
• JSON Diff Checker — Compare JSON values by structure and see added, removed and changed paths.
• JWT Decoder — Read a JWT header, payload and timestamp claims locally in your browser.
• Cron Expression Generator — Build five-field cron schedules and preview upcoming execution times in UTC.
• YAML ↔ JSON Converter — Convert YAML to JSON or JSON to YAML with clear validation errors.
• Unix Timestamp Converter — Convert Unix seconds or milliseconds to UTC and local time, or convert a UTC date to a timestamp.
• Regex Tester — Test JavaScript regular expressions, highlight matches and inspect captured groups.
• UUID Generator — Generate individual or bulk version 4 UUIDs with cryptographically secure browser randomness.
• SQL Formatter — Format SQL queries for PostgreSQL, MySQL, SQLite, SQL Server and other dialects in your browser.
• JSON Schema Generator — Infer a draft 2020-12 JSON Schema from sample JSON, including nested objects and mixed arrays.
• Hreflang Generator — Generate HTML alternate-language tags from language codes and page URLs without fetching any website.
• n8n Workflow JSON Checker — Check exported workflow JSON for structural issues, duplicate nodes and broken connection references.
• Invoice Generator — Create an invoice with line items, a discount and a manually entered tax rate, then print or save as PDF.
• ROI Calculator — Calculate simple return on investment, net gain or loss from investment cost and total returns.