Tools that respect your time
Every developer has a bookmark folder full of one-purpose utilities: a JSON formatter that breaks on large files, a Base64 tool wrapped in three ad units, an SSL checker that wants your email first. QuickDeveloperTools is the attempt to replace that folder with one site that loads fast, works offline where it can, and never asks you to sign up to paste text into a box.
- Tools live
- 46
- Categories
- 10
- Accounts required
- none
- Price
- free
Why this exists
The work that surrounds real engineering is full of small, repetitive checks. Is this JWT expired? Does this certificate cover the wildcard? What is this base64 blob? Why is that page not in the index? Each takes thirty seconds when the tool is good, and ten minutes when it is not.
Most free tools in this space are built to capture traffic rather than to be used. They rank well, load slowly, interrupt you, and quietly send whatever you paste to a server that logs it. The alternative — installing a CLI, or writing a throwaway script — is a lot of ceremony for a thirty-second question.
So the target here is narrow and specific: a tool should answer the question faster than writing the script would have. That single constraint decides most of what follows.
How we build
These are not aspirations on a marketing page. They are the rules we check a tool against before it ships, and the reason several planned tools have been cut.
In the browser by default
If a job can be done client-side, it is. Your JSON, your JWT, your PDF and your passwords never leave the machine.
No account, ever
Nothing is gated behind a sign-up. There is no free tier, because there is no paid tier to upsell you to.
Explain, don't just output
A red cross is not an answer. Every check says what was found, why it matters and what to change.
Built for real files
Tools are tested against multi-megabyte inputs, not the pretty three-line example. A formatter that dies at 5 MB is not a formatter.
Keyboard first
Every page works without a mouse, and the command palette (⌘K or Ctrl K) reaches any tool in two keystrokes.
No dark patterns
No interstitials, no fake urgency, no result held back until you share the page. If a tool works, it works completely.
What happens to your data
The honest version, because "we take your privacy seriously" means nothing. There are exactly two kinds of tool on this site.
- Client-side tools
- Formatters, encoders, hash and password utilities, PDF tools, token calculators. These run entirely in your browser. The data you paste or the file you drop is never uploaded — you can confirm this by opening your browser's network tab, or by disconnecting from the internet and using the tool anyway.
- Server-side tools
- SSL, TLS, DNS, header, redirect, sitemap and SEO checks. These must run on a server, because a browser cannot open a socket to another host or read another origin's response headers. We send the hostname or URL you typed, read the reply, return the result, and keep nothing.
Each tool states which kind it is in its own header, so you never have to guess. The full detail is in the privacy policy.
How this is paid for
Servers, domains and certificates cost money, and pretending otherwise would be the first dishonest thing on this page. Today the site is funded personally. If that changes — sponsorship, non-tracking advertising, or an optional paid tier for heavier automation — it will be stated plainly here and in the privacy policy before it launches, not discovered after the fact.
Whatever the funding model becomes, the existing tools stay free and stay account-free. Monetisation will never mean holding a result hostage.
What we are not
Knowing where a tool stops is as useful as knowing what it does, so:
- This is not a security audit. The security tools check configuration that is publicly visible. They do not find application vulnerabilities and are not a substitute for a penetration test.
- This is not legal or compliance advice. A green result on a headers check does not make you GDPR compliant.
- The SEO tools grade on-page signals only. Content quality, search intent and links from other sites decide rankings, and none of those can be read out of your HTML.
- Third-party data — geolocation, reputation, ASN ownership — is as accurate as its upstream source, which for IP geolocation means city-level guesses that are regularly wrong.
Where we are going
The roadmap is driven by what people actually ask for. Tools get built when the same request arrives more than once; they get cut when they cannot beat the thirty-second rule. If something you use daily is missing, or something here is wrong, that feedback is genuinely the most useful thing you can send.
Tell us what to build next, or browse everything that already exists.
Questions about any of this?