Your next debugging task, solved.

Test APIs. Make sense of your data.

Capture a webhook, test a WebSocket connection, or paste JSON for an instant preview. No signup. Start with the task in front of you.

No data ready? Try an example.

Or paste your own content below

● Smart Paste⌘ K

Paste to detect. No tool hunting.

Try an exampleNo data needed

Choose a task above to see the result.

JSON       → Formatted data
cURL       → Fetch code
Base64     → Readable text

Previewed locally. Continue with your original input in the full tool.

Jump toBase64 WebSocket JSON SQL Regex Timestamp All 51 tools →

Encoding and connection checks

Understand the result. Know what to check next.

Base64 Encoder & Decoder — Text, Files & Base64URL

Encode or decode Base64 text and files online. Supports UTF-8, Base64URL, padding, line-by-line conversion, data URIs, preview, and download in your browser.

Open tool →

WebSocket Online Tester

Connect to ws:// or wss:// endpoints directly from your browser, send text or JSON messages, and inspect timestamped events.

Open tool →

WebSocket connection troubleshooting: WSS, code 1006 and browser authentication

A shorter path to done

One paste. A complete developer workflow.

Start with a task, then carry the result into the next tool.

01 / API

Turn an API response into types

Paste JSON to generate Go, TypeScript, Java, or Python types.

JSON→Go / TypeScript

Generate types ↗ 02 / HTTP

Take a request into your code

Convert cURL into request code with clear compatibility notes.

cURL→Fetch / Python / Go

Convert a request ↗ 03 / DATA

Decode, format, and extract

Combine and save recurring steps, ready for the next input.

Base64→JSON→JSONPath

Open a pipeline ↗

Start with a working example

Pick a task. See it work.

Each template includes input and options. Replace the sample with your data and save it for next time.

Decode API data

Base64 → JSON → JSONPath

Extract user fields

JSON → $.user.roles[*]

Clean a log list

Trim → Remove empty lines → Deduplicate

Document an API response

JSON sample → Schema → Docs & validation

Clean CSV and prepare SQL

Table → Column cleaning → SQL INSERT

Prepare order test data

Fixed seed → Field rules → JSON / CSV / SQL

Everyday essentials

Ready for your next task.

Built around the recurring steps in APIs, structured data, text work, and debugging.

Browse all tools →

Data

JSON to Code

Generate Go structs, TypeScript interfaces, Java records, or Python dataclasses from sample JSON entirely in your browser.

Runs locally Developer

Pipeline

Build a reusable browser-local workflow such as Base64 decode → JSON format → JSONPath extract, then run it in one click.

Runs locally Data

JSON Formatter

Format, minify, and validate JSON with useful line and column errors. Your data stays entirely in this browser.

Runs locally Developer

cURL Converter

Convert cURL to Fetch, Axios, Node.js, Python, Go, Java, PHP, or C# code locally in your browser.

Runs locally Data

JSON Diff

Compare two JSON documents by path and find added, removed, changed, and type-mismatched values without uploading data.

Runs locally Data

YAML ↔ JSON

Convert common YAML documents to JSON and JSON back to readable YAML without uploading configuration data.

Runs locally Security

JWT Decoder

Decode JWT headers and claims, inspect timestamps, and check expiration locally. Decoding does not verify the signature.

Runs locally Developer

Regex Tester

Test regular expressions with live matches, capture groups, flags, and a safe replacement preview. Everything runs in your browser.

Runs locally

Tool categories

Enter by the work in front of you.

Choose tools by task, with practical steps and common pitfalls.

Data & formatsJSON · CSV · Schema · SQL Encoding & conversionBase64 · URL · Files Web, APIs & deploymentcURL · WebSocket · Webhook Tokens & certificatesJWT · Hash · RSA · TLS Text & identifiersDiff · Regex · UUID Time & schedulingTimestamp · Cron

⌾

Sensitive input stays in your browser by default.

Smart Paste, JSON, JWT, Base64, cURL, and text tools run in the current tab. Features that require a backend are clearly marked.

Read privacy details

Fix it and move on

Understand the error. Find your next step.

Follow practical troubleshooting steps and use the tools to check your result.

Error fixes Guides

CORS

Your go-to tools

Your saved tasks

Test APIs. Make sense of your data.

No data ready? Try an example.

Understand the result. Know what to check next.

Base64 Encoder & Decoder — Text, Files & Base64URL

WebSocket Online Tester

One paste. A complete developer workflow.

Turn an API response into types

Take a request into your code

Decode, format, and extract

Pick a task. See it work.

Decode API data

Extract user fields

Clean a log list

Document an API response

Clean CSV and prepare SQL

Prepare order test data

Ready for your next task.

JSON to Code

Pipeline

JSON Formatter

cURL Converter

JSON Diff

YAML ↔ JSON

JWT Decoder

Regex Tester

Enter by the work in front of you.

Sensitive input stays in your browser by default.

Understand the error. Find your next step.

No 'Access-Control-Allow-Origin' header is present

DNS_PROBE_FINISHED_NXDOMAIN

certificate has expired or is not yet valid

JWT expired or exp claim validation failed