Format and validate JSON instantly.
Browser-based · No sign-up
Free browser-based developer tools for JSON, Base64, JWT, regex, and more
Format JSON, and more—all run in your browser. Private, no sign-up, no server round-trips.
- 115+
- Tools
- 100%
- Private
- Instant
- No round-trips
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Paste anything — we'll find the right tool
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Browse by category
Find the right tool for the job.
AI Tools
Claude-powered helpers for resumes, summaries, and more.
12 tools
Data & encoding
Format, validate, encode, and decode data.
54 tools
Generators
Generate IDs, tokens, and sample data.
12 tools
Text & regex
Test and manipulate text with regular expressions.
11 tools
Network & Security
HTTP headers, IP lookup, and network utilities.
22 tools
CSS & Design
Color tools, CSS converters, and design utilities.
7 tools
JSON Tools
Format, validate, diff, and convert JSON. All JSON tools in one place.
16 tools
Cron Tools
Build and decode cron expressions. Parse and visualize cron schedules.
2 tools
Encoding & Conversion
Base64, URL, HTML encode/decode and format conversion utilities.
14 tools
API Tools
Build, mock, and document APIs. OpenAPI, curl, and HTTP utilities.
12 tools
Regex Tools
Test, debug, and build regular expressions. Regex tester and pattern library.
1 tool
Browser-based tools for everyday developer tasks
ToolDock is a collection of free developer utilities that run entirely in your browser. Whether you need to format JSON, decode a Base64 string, inspect a JWT token, test a regex pattern, or convert a Unix timestamp — everything works locally with no sign-up and no data sent to a server.
Tools cover common workflows for API development, data encoding and decoding, security token inspection, CSS generation, text processing, and network debugging. Each tool is optimized for speed: paste your input and get output instantly, then copy or download the result.
All tools run client-side using standard browser APIs. Your JSON, tokens, passwords, and other sensitive data never leave your device — useful for debugging in environments where you cannot upload data to external services.
Featured tools
Most used utilities. All run in your browser.
Encode and decode Base64 text privately in the browser.
Decode JWT header and payload claims locally in the browser.
Test regex patterns and view matches, groups, and flags instantly.
Convert Unix timestamps to dates and back instantly.
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes instantly.
Generate cryptographically random UUID v4 identifiers instantly.
Generate cryptographically secure random passwords instantly.
Encode and decode URL percent encoding instantly in the browser.
Convert numbers between binary, octal, decimal, and hex instantly.
Generate secure random strings with configurable length and charset.
- AI ToolsAI
Generate a polished ATS-friendly resume with AI from your notes.
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Popular developer tools
Everything runs in your browser. Your data never leaves your device.
JSON tools
Format, validate, and transform JSON for APIs and configs.
Encoding & decoding
Encode and decode Base64, URLs, hashes, and other data formats.
Auth & tokens
Inspect, generate, and validate JWT tokens and UUIDs.
Regex & text
Test regex patterns, compare text, and parse timestamps.
API & network
Validate OpenAPI specs, test CORS, and debug HTTP requests.
Generators
Generate passwords, UUIDs, random strings, and QR codes.
Frequently asked questions
Quick answers about ToolDock.
Yes. All tools run in your browser with no sign-up, no API keys, and no payment.
No. Processing happens locally in your browser. Your JSON, tokens, and text never leave your device.
No. Just open the site in a modern browser. No extensions or downloads required.
Each tool page has its own FAQ. Browse all tools
