Free online tools that run in your browser
Your files never leave your device · No login required · 100% free
Convert, compress, calculate, generate, edit and check files right in your browser — fast, private and easy to use.
Search results
Popular tools
View all toolsBrowse by category
Popular file conversions
View all convertersProgramming
Learn and practise programming in your browser. Pick a language: write code, run it in a real terminal and follow the lessons step by step.
Why Shiklo Tools?
Simple, private tools that just work — right in your browser.
- Private Everything runs in your browser. Files are never uploaded.
- Secure Encrypted HTTPS connection, and nothing you open is stored on our servers.
- No login required No account, no sign-up, no email. Just open a tool and use it.
- Fast No upload or download wait — results appear instantly.
- Free All tools are free to use, with no limits.
- Works everywhere Phone, tablet or computer, in any modern browser.
🆕 New tools
★ Popular tools
Recently used
Frequently asked questions
Are my files or text uploaded anywhere?
No. Every tool runs inside your browser on your own device. Nothing you enter or open is sent to a server.
Do I need to create an account or log in?
No login is required. There are no accounts — open any tool and start using it straight away.
Are the tools really free?
Yes. All tools are free, with no limits or watermarks. The site is supported by ads.
Does it work on my phone?
Yes. The tools work in any modern browser on phones, tablets and computers.
Can I use the tools offline?
Once a tool has loaded it does its work on your device, so it keeps working even if your connection drops.
Which file types are supported?
PDF, Word, Excel, PowerPoint, OpenDocument and RTF documents, JPG, PNG, WebP, HEIC, AVIF, GIF and BMP images, MP4, MOV, WebM and MKV videos, MP3, WAV, M4A, OGG and FLAC audio, ZIP, 7z, RAR, TAR and GZIP archives, CSV, JSON, XML and plain text. Each tool lists exactly what it opens.
All tools with descriptions →
CSS Minifier
Minify CSS: remove comments and whitespace, drop empty rules and redundant semicolons — safely, without changing how it works.
Every byte of CSS has to be downloaded and parsed before a page can render, so smaller stylesheets mean faster pages, especially on mobile connections. The CSS Minifier removes everything the browser doesn't need — comments, indentation, line breaks, spaces around punctuation, the last semicolon in each block, empty rules and leading zeros — while keeping your styles working exactly as before.
It is deliberately careful. Spaces that change meaning are kept: the space in a descendant selector such as .card :hover, the space before a parenthesis in a media query such as screen and (max-width…), and the spaces around plus and minus inside calc(). Strings and url() values are copied exactly. Licence comments that start with /*! can be kept. The tool shows how much smaller the result is, and nothing is uploaded.
How to use CSS Minifier
- Paste your CSS, open a .css file, or press Sample.
- Choose whether to keep /*! licence comments.
- The minified CSS appears as you type, with the size saved.
- Copy it or download it as a .min.css file.
Features
- Removes comments, whitespace and line breaks.
- Drops empty rules and the last semicolon of each block.
- Shortens 0.5 to .5.
- Keeps meaningful spaces in selectors, media queries and calc().
- Strings and url() values are kept exactly.
- Optionally keeps /*! licence comments.
- Shows the size saved; runs in your browser.
Where minified CSS helps most
Render-blocking stylesheets delay the first paint of a page, so trimming them improves loading metrics such as First Contentful Paint. Inline critical CSS in the page head, CSS embedded in HTML emails and snippets pasted into website builders all benefit, because they are not compressed separately by the server.
What the minifier removes
Minification is about removing characters the browser ignores. The table shows the changes this minifier makes. Each one is safe for any valid stylesheet.
| Removed or shortened | Example |
|---|---|
| Comments | /* Buttons */ is removed |
| Indentation and line breaks | Rules joined onto one line |
| Spaces around braces, semicolons, commas and child or sibling combinators | .a , .b { color: red; } becomes .a,.b{color:red} |
| Last semicolon in a block | color:red;} becomes color:red} |
| Empty rules | .unused { } is removed |
| Leading zero | 0.5em becomes .5em |
Safe by design
Aggressive minifiers sometimes break stylesheets by removing spaces that matter. In CSS, .card :hover (any hovered element inside a card) is different from .card:hover (the card itself when hovered); and @media screen and (max-width: 600px) stops working if the space before the parenthesis disappears. calc(100% - 2rem) needs the spaces around the minus sign. This minifier keeps all of these, never touches strings or url() values, and does not attempt riskier rewrites such as merging rules, reordering properties or changing colour formats. You get most of the savings with none of the surprises.
Minify, compress, or both?
How much minification saves depends on how many comments and how much whitespace a stylesheet contains; the tool shows the exact saving for yours. Servers then usually compress files with gzip or Brotli for transfer, which reduces size much further; minified and compressed files are smaller still than compressed ones alone. For production sites, minify as part of your build process so it happens automatically. This tool is ideal for quick jobs: a theme tweak, a CSS snippet for an email or widget, a WordPress custom CSS box, or checking how much a stylesheet would shrink.
Keep a readable copy
Always keep your original, readable stylesheet and minify a copy for publishing — minified CSS is hard to edit. If you need to read a minified stylesheet, the CSS Formatter lays it out again with one declaration per line. Licence comments that begin with /*! are kept by default, because many open-source licences require the notice to stay with the code. If the CSS contains an unclosed comment or string, the minifier stops and shows where, instead of producing broken output.
Frequently asked questions
How do I minify CSS?
Paste the CSS or open a file; the minified version appears immediately. Copy or download it.
Will minifying break my CSS?
No. Only characters the browser ignores are removed, and meaningful spaces are kept.
How much smaller will my CSS be?
It depends on the comments and whitespace in your file; the tool shows the exact saving as a percentage.
Are licence comments kept?
Yes, comments starting with /*! are kept unless you turn the option off.
Can I unminify CSS later?
Use the CSS Formatter to make minified CSS readable again; removed comments cannot be restored.
Is my CSS uploaded?
No. Minification runs in your browser.
Related tools
CSS FormatterBeautify CSS, SCSS and Less: one declaration per line, consistent indentation and spacing, with syntax errors shown by line.
JavaScript MinifierMinify JavaScript with Terser: remove whitespace and comments, shorten local names and compress code, with syntax errors shown by line.
HTML FormatterBeautify HTML, including inline CSS and JavaScript, with Prettier, or minify it safely. Indent, line width and whitespace options. Private.
SQL MinifierMinify SQL: remove comments and extra whitespace outside strings to put queries on one line — for code, configs and logs.
Image CompressorCompress JPG, PNG and WebP images in your browser — up to 80% smaller with no visible loss. Batch, target size (e.g. under 100 KB), no upload.
JSON FormatterFormat, beautify and minify JSON with 2/4-space or tab indentation, sorted keys and a collapsible tree view. Big numbers stay exact. Private.