Developer instrument panel

Good day.

Pick up where you left off, or jump into any of the ten tools.

Recent

Stored only in this browser

All tools

One click to open

Indent

Input Paste JSON or XML · or drop a file

Output

Cursor: Line 1, Col 1

URL-safe

Input Type, paste, or drop a file

Output

Token Paste a JWT string

Header

Secret

Payload

Signature

Ignore whitespace Ignore case Ignore blank lines Normalize tabs

Original Drop a file or paste

Modified Drop a file or paste

Diff

Input

Accepts Unix seconds, Unix milliseconds, an ISO date string, or a SAP timestamp (YYYYMMDDHHMMSS)

Output · Click any value to copy

Timezones · drag the time bar or a timeline to shift every row · remembers your list between visits

Renderer

W × H in

DPI

Samples: · drop a .zpl file

Auto

Image drop · click · paste (Ctrl+V) · drag handles to crop · Ctrl+scroll to zoom

Preview

Threshold Dither Scale 100%

Drop an image, click to browse, or paste from clipboard

ZPL (^GFA)

Compress

W × H in

DPI

Filter Contrast Brightness Threshold

Image drag handles to crop · Ctrl+scroll to zoom · drag to pan

Decoded output

Drop an image, click to browse, or paste from clipboard

Works best on an unrotated scan with a white quiet border — for a whole label, drag the crop handles around just the barcode if auto-detect doesn't find it