All articles tagged with “Free Tools”.
All articles tagged with “Free Tools”.
Paid developer tools are often unnecessary. Here are the best free, browser-based alternatives covering formatting, encoding, security, CSS, design, and API testing — all on DevToolShack.
Read Article.htaccess is the Apache config file that controls redirects, security headers, custom error pages, and access rules. Learn the most useful directives and generate them free.
Read ArticleIP lookup tools reveal geolocation, ISP, ASN, and more. Learn what your IP address tells the world, how to look up any IP instantly, and why developers use this daily.
Read ArticleCSS specificity is the algorithm that determines which style wins when multiple rules target the same element. Understand it once and CSS becomes far less frustrating.
Read ArticleYAML and JSON store the same data but feel completely different to write and read. Learn the key differences, when each shines, common YAML gotchas, and convert instantly free.
Read ArticleA favicon isn't just one file anymore — modern sites need dozens of sizes for browsers, mobile home screens, and PWAs. Learn what you need and generate them all instantly free.
Read ArticleDiff tools reveal exactly what changed between two versions of text, code, or data. Learn how diff works, the formats it produces, and compare any text instantly free.
Read ArticleCSS gradients are more powerful than most developers use them. Learn linear, radial, and conic gradients — every syntax option, layering tricks, and a free visual generator.
Read ArticleSVG files exported from design tools are bloated with unnecessary metadata. Learn what makes SVGs large, what's safe to remove, and optimize them instantly free in your browser.
Read ArticleDNS records control where your domain points and how email is routed. Learn what A, CNAME, MX, TXT, and NS records do — and look up any domain's records instantly free.
Read ArticlePixels ignore the user's browser font size preference — rem doesn't. Learn the difference between px, rem, and em in CSS, when to use each, and convert values instantly free.
Read ArticleCron expressions look cryptic but follow a simple pattern. Learn every field, common schedules, the gotchas that catch people out, and build expressions with a free visual tool.
Read ArticleHMAC signatures let APIs verify that requests are authentic and unmodified. Learn how HMAC works, how to sign and verify requests, and generate signatures instantly free.
Read ArticleJSON, CSV, and XML all store data — but they're built for different jobs. Learn when to use each, how to convert between them, and which format your project actually needs.
Read ArticlePoor color contrast makes your site unusable for millions of people — and fails legal compliance. Learn WCAG contrast ratios, how to test them, and fix failures fast.
Read ArticleA misconfigured robots.txt can deindex your entire site overnight. Learn the syntax, common mistakes, what to block and what not to, and generate one correctly free.
Read ArticleCSS border-radius goes deeper than rounded corners. Learn every syntax variant, how to create pills, circles, and asymmetric blob shapes, plus a free visual generator.
Read ArticleBCrypt is deliberately slow — and that's the point. Learn why fast hashing algorithms are wrong for passwords, how BCrypt works, and how to use it correctly in your apps.
Read ArticleMarkdown is great for writing — HTML is what browsers render. Learn when to convert between the two, the syntax that maps to what, and convert instantly free in your browser.
Read ArticlecURL is the essential tool for testing APIs, debugging HTTP, and automating requests from the terminal. Learn the most useful flags and generate commands free in your browser.
Read ArticleHEX, RGB, HSL — three ways to describe the same color. Learn what each format means, when to use each in CSS, and how to convert between them instantly free.
Read ArticleMinifying CSS and JavaScript reduces file sizes and speeds up your site — no Webpack or build pipeline required. Learn what minification does and how to do it instantly free.
Read ArticleUnix timestamps are the universal language of time in programming — but converting them by hand is a pain. Learn what they are, common pitfalls, and convert them instantly free.
Read ArticleOpen Graph tags control how your pages look when shared on Facebook, LinkedIn, Slack, and more. Learn every tag, the right image sizes, and generate them instantly free.
Read ArticleHTTP status codes tell you exactly what went wrong — if you know how to read them. A practical guide to every code class, the most common codes, and how to debug each.
Read ArticleGrid and Flexbox solve different layout problems — and knowing which to reach for saves hours of fighting CSS. Here's how to choose, with practical examples of each.
Read ArticleQR codes aren't just for menus — developers use them for app links, Wi-Fi sharing, 2FA setup, deep links, and local dev testing. Learn how they work and generate them free.
Read ArticleSSL certificate errors kill user trust and break HTTPS. Learn how to check any certificate's validity, expiry, chain, and common failure modes — free, in your browser.
Read ArticleFrom word counters to diff checkers, these free browser-based text tools solve the small problems that slow developers down every day. All free, no sign-up needed.
Read ArticleJWTs are everywhere in modern auth — but most developers use them without truly understanding them. Learn what's inside a token, how signing works, and common pitfalls.
Read ArticleThe complete CSS Flexbox reference — every container and item property explained with practical examples, common layout patterns, and a free visual Flexbox tool.
Read ArticleMeta tags control how your pages appear in search results and social shares. Learn which tags matter, what to write in them, and generate a perfect set in seconds.
Read ArticleMD5 and SHA-256 both produce hashes — but they're not interchangeable. Learn what each is good for, why MD5 is broken for security, and when to use which algorithm.
Read ArticleURLs break when special characters aren't encoded correctly. Learn what percent-encoding is, which characters need it, and how to fix broken URLs instantly.
Read ArticleMaster CSS box-shadow — every parameter explained, layered shadows, inset shadows, common design patterns, and a free visual generator to build them without guessing.
Read ArticleWhat actually makes a password strong? Length, randomness, entropy — explained plainly. Plus how to generate and check secure passwords instantly in your browser.
Read ArticleUUID and Nano ID both generate unique identifiers — but they make different trade-offs. Here's how to choose the right one for your database keys, URLs, and tokens.
Read ArticleBase64 isn't encryption — it's encoding. Learn what it actually does, when to use it, when not to, and how to encode and decode instantly in your browser.
Read ArticleRegular expressions look intimidating but they're built from just a handful of simple concepts. Learn anchors, character classes, quantifiers, and real-world patterns with a live tester.
Read ArticleRaw JSON is nearly impossible to read. Learn how to format, validate, and debug JSON instantly in your browser — no tools to install, no accounts to create.
Read ArticleFormat, encode, generate, and convert — everything runs client-side. No account needed.