Lint Dockerfiles against 20+ valid instructions (FROM, RUN, CMD, COPY, ENTRYPOINT, HEALTHCHECK, SHELL). Detects unknown instructions and missing FROM declaration. Everything runs locally in your browser — nothing is uploaded.
Parse browser, operating system, and version from any User-Agent string. Detects Chrome, Firefox, Safari, Edge, and the client OS from request headers.
Convert lists between delimiters: comma, newline, pipe, tab, semicolon, and space. Auto-detects input format and supports trim, sort, and deduplicate.
Validate GraphQL schema syntax and structure. Detect missing root types, unknown type references, and common schema issues.
Check and correct grammar, spelling, and punctuation in your text. Detects common errors including homophones, misspellings, punctuation issues, and run-on sentences.
Counts characters with and without spaces and compares your text against platform-specific limits — Twitter/X posts (280), SMS messages (160), SEO meta descriptions (160), Facebook posts (63,206), and LinkedIn summaries (2,600). Real-time counting with space/no-space toggle.
Dockerfile Linter lets you lint Dockerfiles against 20+ valid instructions (FROM, RUN, CMD, COPY, ENTRYPOINT, HEALTHCHECK, SHELL). Detects unknown instructions and missing FROM declaration. Everything runs locally in your browser — nothing is uploaded.. It works on any device with a modern web browser.
Lint Dockerfiles against 20+ valid instructions (FROM, RUN, CMD, COPY, ENTRYPOINT, HEALTHCHECK, SHELL). Detects unknown instructions and missing FROM declaration. Everything runs locally in your browser — nothing is uploaded. It's ideal for developers, designers, and anyone who needs to lint dockerfiles against 20+ valid instructions (from, run, cmd, copy, entrypoint, healthcheck, shell) without installing software or sending data to external servers.
Direct text entry, file upload, or URL-based input — depending on the tool. Paste or type your content directly into the provided editor area.
Yes. After the initial page load, Dockerfile Linter runs entirely on your device with no internet connection needed. All processing is done locally.
Tools cover JavaScript, CSS, HTML, SQL, Python, JSON, XML, CSV, and more. Check individual tool descriptions for specifics.
No. All code processing — formatting, minification, conversion, hashing — runs locally in your browser.
Yes. Since processing is local, performance depends on your device. Most operations handle large files without issue.
Yes. SQL uses sql-formatter, JSON uses native JSON.parse, and other formatters follow widely adopted formatting rules.
Yes. All developer tools work fully offline after the initial page load.
Time Converter
Convert between time units including seconds, minutes, hours, days, weeks, months, and years with precise decimal results.
Diff Checker
Compares two input texts side-by-side, highlighting inserted, deleted, and changed lines with distinct background colors.
Regex Tester
Provides an interactive environment where users can write a regular expression pattern, test it against sample strings, and view real-time match.
JSON Formatter
Pretty-prints raw JSON with configurable indent width, key sorting, and bracket collapsing options while flagging syntax errors with exact.
JS Minifier
Strips comments, whitespace, and shortens local variable names in JavaScript source without altering execution semantics.
Base64 Encode/Decode
Encodes text or small files into Base64 strings and decodes them back with automatic MIME-type detection for binary safety.