Developer Tools
Online Developer Tool
Free browser-based developer utilities for formatting, encoding, decoding and converting data
- 0community votes
- 1DR by Ahrefs no change since last check
Ahrefs Domain Rating listed 10 Nov 2026, relisted 8 Nov 2026.
A collection of 54 free, browser-based developer tools for formatting, encoding, decoding, converting, generating, validating and checking data with no signup
What it is
Online Developer Tool: the homepage
Online Developer Tool is a suite of 54 free browser-based utilities designed to handle repetitive developer tasks instantly. The tools cover JSON formatting and validation, JWT decoding and generation, Base64 encoding and decoding, UUID generation, timestamp conversion, hashing, and various text and data processing utilities including XML, YAML, CSV conversion and regex testing.
All tools run locally in your browser with no server uploads or account required. The only exception is the Website Status Checker, which sends requests from your browser to the URLs you enter. The platform aims to eliminate time-consuming context switching by providing a single consolidated workspace for common developer chores.
Listed capabilities
- JSON to code generation (C#, TypeScript, Java, Python, Go, PHP, Kotlin)
- JWT decoder and generator with HS256 support
- Base64, URL and HTML encoding and decoding
- UUID generation and validation
- Hash generation (MD5, SHA-256, SHA-512)
- Timestamp conversion (Unix time and dates)
- XML and YAML formatting and conversion
- Regex testing and diff checker
- Website status and reachability checking
Pricing
Pricing model: Free
Follow Online Developer Tool for an email about each milestone, update and new product they post, in a daily summary.
Online Developer Tool metrics
| Metric | Value |
|---|---|
| Domain Rating | 1 no change since last check |
| Trust Flow | 4 no change since last check |
| Citation Flow | 17 no change since last check |
| Referring domains | 4 no change since last check |
| External backlinks | 15 no change since last check |
Ahrefs Domain Rating listed 10 Nov 2026, relisted 8 Nov 2026. Listed under topic: Arts/Writers Resources (4). Majestic listed 8 Nov 2026, relisted 8 Nov 2026. Link data listed by Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.
Online Developer Tool domain listing data
Show the listing data
| Domain age | 1 month |
|---|---|
| Registered | |
| Expires | |
| Registrar | Cloudflare, Inc. |
| DNSSEC | Not signed |
Online Developer Tool launch receipt entry
| Measure | At launch, then latest |
|---|---|
| Domain Rating (Ahrefs) | 1 to 1 no change since launch 8 Nov 2026, then 10 Nov 2026 |
| Trust Flow (Majestic) | 4 first measured 8 Nov 2026 |
| Referring domains (Majestic) | 4 first measured 8 Nov 2026 |
Day 2 since launch. Next receipt: day 30, 8 Dec 2026. We show what changed, not what caused it: many things affect these numbers. Nothing here is estimated.
Before you launch
The playbook on SaaS Directory List lists what to prepare, what to post on launch day and where else to list your product.
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Quick answers
What is OnlineDeveloperTool?
OnlineDeveloperTool is a collection of 54 free, browser-based developer tools for everyday tasks like formatting, encoding, decoding, converting, generating, validating and checking data with no signup required.
Is my data uploaded anywhere?
No. The tools run in your browser, so what you paste is processed locally. The only exception is the Website Status Checker, which sends a request from your browser to the sites you type in, so those sites will see it.
Does the JWT decoder verify the signature?
No. It splits the token and shows the decoded header and payload. Verifying a signature needs the signing key and should happen on your server.
Is Base64 a form of encryption?
No. Base64 is an encoding that anyone can reverse. It makes data about one third larger and does not protect secrets.
Does it work on a phone or tablet?
Yes. The layout adapts to small screens, though pasting big payloads is still easier on a keyboard.
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