Most used developer tools
- JSON FormatterAPI payloadsLocal
- JWT DecoderToken reviewLocal
- Base64 Encoder/DecoderEncode/decodeLocal
- Regex TesterPattern testingLocal
Best for
API debuggingToken inspectionRegex testingText comparisonEncoding and hashing
Developer Workbench
Local-first tools for JSON, JWTs, Base64, regex, text diff, hashes, URLs, and everyday developer workflows.
Paste a snippet, token, encoded value, regex, URL, or diff to choose the right local tool.
Manual tool selection is available now. Auto-detection is planned.
Developer inputs can contain secrets. Avoid pasting production tokens, private keys, passwords, or confidential source code.
Fast local recipes for API payloads, tokens, regex, and diffs.
Format payloads and copy clean output.
Decode tokens and review claims locally.
Build patterns with examples and groups.
Compare changes before copying or shipping.
Format JSON, SQL, and code with clear validation feedback.
Encode and decode Base64, URLs, and common text formats.
Inspect tokens, hashes, passwords, and identifiers locally.
Decode JWT headers and claims locally.
Create checksums and hashes in-browser.
Generate strong passwords locally.
Generate UUIDs for dev and testing.
Test patterns, compare text, and review changes quickly.
Generate UUIDs, QR codes, colors, and quick utilities.
Jump to popular tools or follow a recommended workflow.
Best for
The fastest path for API payloads and config files.
Privacy model
Local-first
Runs in your browser where supported.
Sensitive input
Never paste production secrets or keys.
AI optional
Only when you explicitly choose it.
14 tools14 browser-firstNo signup required
Developers and technical users who format JSON, decode JWTs, test regex, compare text, and run quick encoding tasks in the browser.
Match your task to the fastest local utility.
Quick answers about privacy, local processing, and accounts.
Most formatting, encoding, hashing, and decoding tools run in your browser. Check each tool's badge before pasting sensitive tokens or keys.
Avoid production secrets. DevToolKit processes input locally where possible, but treat every paste as potentially sensitive.
No AI runs automatically on developer input. Any AI-assisted features should require explicit consent.
No signup is required for the developer workbench. Open a tool, paste or type, and copy the result.
Treat tokens, keys, and production data carefully before you paste anywhere.
Formatting, hashing, encoding, and decoding should run in your browser where possible.
Never paste production secrets, private keys, or passwords into tools you do not trust.
AI explanations should require explicit consent and never run automatically on JWTs, keys, passwords, or source code.
Share recipes, not private input.
Need PDFs, images, or everyday utilities?
PDF Workspace
Merge, compress, sign, and secure PDFs.
Image Studio
Compress, convert, and prepare images.
14 developer toolsPrivacy & trust