All Coding Tools

Debugging API Requests

Decode a URL-encoded query string to read it, or encode a parameter value that contains special characters breaking your request.

Working with Data URIs

Base64-encode an image or file to embed it directly in HTML/CSS as a data URI — no external request, no server needed.

Verifying File Integrity

Generate a SHA-256 hash of a file or string to compare against a published checksum and confirm the file hasn't been tampered with.

Writing Documentation

Write in Markdown and instantly preview the rendered HTML output. Download the HTML file to paste into a CMS or static site.

JWT & Token Inspection

Base64-decode a JWT payload or API token to inspect its claims and structure without needing a dedicated JWT debugger.

Encoding Form Data

Manually build URL-encoded form POST bodies or fix encoded redirect URLs in OAuth and SSO flows.

Debug a Broken API Request

1. 1URL Encoder / Decoder — decode the query string to read it
2. 2Identify the broken parameter or special character
3. 3URL Encoder / Decoder — re-encode the fixed value

Embed an Image in HTML

1. 1Base64 Encoder / Decoder — encode the image file
2. 2Copy the Base64 string as a data URI
3. 3Code Beautifier — format the HTML output cleanly

Publish Documentation

1. 1Write content in Markdown format
2. 2Markdown to HTML — convert to clean HTML output
3. 3Code Beautifier — format the HTML before pasting into CMS

Verify a Downloaded File

1. 1Hash Generator — generate SHA-256 of the downloaded file
2. 2Compare against the published checksum on the website
3. 3Mismatch = file tampered; match = file is authentic

Inspect a JWT Token

1. 1Copy the JWT token (the middle payload section)
2. 2Base64 Encoder / Decoder — decode to see the claims
3. 3Check expiry, user ID, roles, and other fields

Build an OAuth Redirect URL

1. 1URL Encoder / Decoder — encode the redirect_uri parameter
2. 2Encode the state and scope values the same way
3. 3Combine into the full authorization URL