LocalFirstTools vs IT-Tools

IT-Tools is Corentin Thomasset's open-source (GPL-3.0) catalog of client-side developer utilities, self-hostable with Docker, with 87 tools in its public GitHub registry. LocalFirstTools ships 28 tools under one published rule: processing stays in the tab, which you can check in DevTools. Use IT-Tools for breadth and self-hosting. Use LocalFirstTools when you want a smaller toolkit with a public no-upload audit.

Last updated 2026-10-13, factual comparison, no affiliate links.

The short verdict: IT-Tools wins on breadth, license and self-hosting, 87 tools, GPL-3.0, a Docker image, and translations. LocalFirstTools wins on a smaller, uniform toolkit with a published no-upload audit. If you want bcrypt, QR codes, subnet math or a homelab copy, go there. If the job is JSON, tokens, hashes or UUIDs and you want to check the network tab against a written procedure, use the local toolkit.

Choose LocalFirstTools if…

You want a published, repeatable check that input never appears in a request
The job is one of the everyday data tools: JSON, JWT, Base64, hashes, UUID v7
You prefer one privacy model and one design across a small catalog

Choose IT-Tools if…

You need a tool LocalFirstTools does not ship (bcrypt, QR codes, IPv4 math, OTP, IBAN, …)
You want to read and self-host the code under GPL-3.0
You need the UI in a language other than English

Side by side

	LocalFirstTools	IT-Tools
Number of tools	28, focused on data and text	87 in its public GitHub registry when this page was written
License	Proprietary; source is private	GPL-3.0, public GitHub repository
Self-host	No; use the hosted pages	Yes; documented Docker images
Local processing	Yes, with a published DevTools check	Client-side Vue app; verify per tool in the network tab
Account / ads	None	None required; optional donations
Translations	English only	Several languages on it-tools.tech

Strengths and trade-offs

LocalFirstTools

Published no-upload model, SHA256SUMS and a 10-second verification page
UUID v7 (RFC 9562), structural JSON diff, CSV viewer for large files
28 tools that share one design and one privacy rule

Much smaller catalog; long-tail IT utilities are out of scope
Not open source and not self-hostable
English only

IT-Tools

Large catalog: crypto, converters, network, math, images, web helpers
GPL-3.0, public source, Docker self-host
Translated UI

No published per-build hash manifest or DevTools audit page like /how-it-works
Uniformity of depth varies across a catalog that large

Two client-side toolkits, different bets

IT-Tools (it-tools.tech) is Corentin Thomasset's collection of handy online tools for developers. The public repository is GPL-3.0. The live about page describes a Vue 3 app hosted on Vercel, and the README documents Docker self-hosting. That is a real advantage if you want the code on a machine you run.

LocalFirstTools is a smaller, proprietary toolkit. Processing still runs as JavaScript in your tab, but the source is not a public release. What it publishes instead is a written verification procedure, build hashes and first-party measurements on /stats. Those are different kinds of trust: inspectable code versus inspectable behaviour plus checksums. Pick the one that matches how you evaluate a tool.

Where IT-Tools is stronger

Breadth. The GitHub tool registry grouped 87 utilities when this page was written, including bcrypt, RSA key pairs, QR codes, IPv4 subnet math, OTP, IBAN parsing and a chmod calculator. LocalFirstTools does not ship those, and it will not pretend to. IT-Tools also translates the UI; this site is English-only.

Where LocalFirstTools is stronger

A uniform no-upload rule you can check, plus a few data tools IT-Tools either lacks or treats more lightly: RFC 9562 UUID v7, a structural JSON diff that ignores key order, and a CSV viewer that keeps 100k-row exports in the tab. If those jobs are why you opened a comparison, stay here. If you wanted a Swiss-army catalog you can fork, IT-Tools is the better fit.

Try the local-only way

Pretty-print, beautify, minify and validate JSON in your browser, 100% client-side. Nothing is uploaded, verify it in your network tab.

Open the JSON Formatter What is UUID v7?Pretty-print JSON with jq, Python and JavaScript

Frequently asked questions

Is IT-Tools open source?

Yes. IT-Tools is published under the GPL-3.0 license at github.com/CorentinTh/it-tools and can be self-hosted with the published Docker images. LocalFirstTools is proprietary: the source repository is private and is not offered as an open-source project.

How many tools does each site ship?

IT-Tools listed 87 tools in its public GitHub registry (CorentinTh/it-tools, toolsByCategory) when this page was written. LocalFirstTools ships 28, on purpose. Count the live catalogs if you need a current number; catalogs move.

Do both run in the browser?

IT-Tools is a client-side Vue app and does not advertise an upload API; still watch the network tab for the specific tool you open. LocalFirstTools publishes a 10-second DevTools check and SHA256SUMS per build. Same class of architecture, different proof.