Extract Base64 Fields from JSON Events
Paste any JSON event payload, auto-detect every Base64 field, then decode or convert it using any Base64 tool — download as PDF, image, Word, Excel, or plain text.
How to json event → base64
- 1
Paste your JSON event data into the text area.
- 2
Click "Extract Base64 Fields" — every Base64 value is detected automatically.
- 3
Pick the field you want to process from the field dropdown.
- 4
Choose a Base64 tool (e.g. Base64 → PDF, Base64 → Image) and click Apply.
Frequently asked questions
What counts as a Base64 field?▾
Any string value that only contains Base64 characters and is at least 64 characters long, or a full data URI (data:[mime];base64,…).
Does this upload my data anywhere?▾
No. Everything runs entirely in your browser. Your JSON event data never leaves your device.
What Base64 tools are available?▾
Base64 → Text, PDF, Image, Word (.docx), Excel (.xlsx), and a generic File decoder that auto-detects the MIME type. You can also re-encode a decoded field back to Base64.
What if a field is not detected?▾
Very short strings or non-standard encodings may be missed. You can copy the value manually and use any of the standalone Base64 tools.