How do I make a PDF smaller?

Add the PDF, choose a compression level, and download the compressed version. Stronger compression gives smaller files at lower image quality.

Are my files uploaded anywhere?

No. Compression happens entirely in your browser. Nothing is sent to a server, so your data stays on your device.

Will compression reduce quality?

It can. Compression mostly recompresses the images inside the PDF, so higher compression means softer images. Text stays sharp.

ToolGalaxy

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PDF Compressor

Compress PDF files online for free. Reduce file size while maintaining quality. 100% client-side.

Target size (KB, optional):

Compression Level

Drag & drop PDF files here

or click to browse

PDF files only • Multiple files supported

100% Client-Side: Your files are processed entirely in your browser and never uploaded to any server.

PDF Compression Explained

PDFs can get large when they include high-resolution images, embedded fonts, scanned pages, or repeated resources. Smaller PDFs are quicker to upload, easier to email, and faster to open on mobile devices.

You can pick a compression level based on your goal: Low keeps more original quality, Mediumis a balance, and High aims for a smaller file size (especially helpful for image-heavy PDFs).

Related Tools

PDF Merge

Merge multiple PDF files into one. Drag and drop to reorder. 100% client-side.

PDF Page Rearrange

Reorder, rotate, and delete PDF pages by drag and drop. 100% client-side processing.

Image Format Converter

Convert images between PNG, JPG, WebP, GIF, BMP, AVIF and more.

PDF Tools

PDF Merge - Merge multiple PDF files into one. Drag and drop to reorder. 100% client-side.

PDF Split - Split PDF files into multiple documents by page ranges. 100% client-side.

PDF Compressor - Compress PDF files to reduce size. 100% client-side, your files never leave your browser.

PDF Page Rearrange - Reorder, rotate, and delete PDF pages by drag and drop. 100% client-side processing.

PDF Page Resizer - Resize all PDF pages to a uniform size. Match to first page, largest, or custom dimensions.

PDF Converter - Convert images, text, and HTML to PDF. 100% client-side.

PDF Password - Add password protection to PDF files. Secure your documents.

PDF to JPG Converter - Convert each page of a PDF to a JPG image. 100% client-side.

Image Tools

Image Resizer - Resize images to exact dimensions and optionally compress them.

Image Compressor - Compress images to reduce file size while maintaining quality.

Image Format Converter - Convert images between PNG, JPG, WebP, GIF, BMP, AVIF and more.

Passport Photo Maker - Create passport photos for any country with exact dimensions.

SVG to PNG Converter - Convert SVG to PNG at any size with a transparent background.

Text Tools

Text Case Converter - Convert text between uppercase, lowercase, title case, and more.

HTML Editor - Rich text WYSIWYG editor with table support and HTML export.

HTML ↔ Markdown Converter - Convert HTML to Markdown or Markdown to HTML instantly.

HTML/CSS Viewer - Live preview your HTML and CSS code. See changes instantly as you type.

Markdown Viewer - Write and preview Markdown in real-time with GitHub Flavored Markdown support.

Word Counter - Count words, characters, sentences and paragraphs and estimate reading time.

Lorem Ipsum Generator - Generate placeholder text by paragraphs, sentences or words.

Text Diff Checker - Compare two texts and see added and removed lines.

Remove Duplicate Lines & Sort - Remove duplicate lines, sort, reverse, trim or drop empty lines.

Converters & Encoders

Base64 Encoder/Decoder - Encode and decode Base64 strings instantly. Perfect for encoding binary data, images, or text.

Base Encoder/Decoder (16/32/85) - Convert text to Base16 (Hex), Base32, or Base85 and back.

URL Encoder/Decoder - Encode URLs and decode percent-encoded strings for web development.

Number Base Converter - Convert between binary, octal, decimal, and hexadecimal number systems instantly.

Binary / Hex / Text Converter - Convert text to binary, hexadecimal, and back instantly.

Hash Generator - Generate cryptographic hashes using MD5, SHA-1, SHA-256, SHA-384 and SHA-512 algorithms.

UUID Generator - Generate UUIDs in bulk: v1, v2, v3, v4, v5, v6 and v7, plus nil and max.

Password Generator - Generate strong random passwords with a secure random generator.

Unix Timestamp Converter - Convert Unix timestamps in seconds, milliseconds, microseconds or nanoseconds to dates and back.

QR Code Generator - Create a QR code for any link or text and download it as PNG.

Image to Base64 Converter - Convert an image to a Base64 data URL for HTML, CSS or JSON.

Color Converter - Convert colors between HEX, RGB and HSL and check WCAG contrast.

Percentage Calculator - Calculate X% of Y, what percent X is of Y, and percentage change.

HTML Entities Encoder & Decoder - Encode special characters to HTML entities or decode them back to text.

Calculators & Time Tools

EMI & Loan Calculator - Calculate monthly loan payments (EMI), total interest and the full repayment schedule.

Age Calculator - Find your exact age in years, months and days, and the days to your next birthday.

Date Difference Calculator - Days, weeks, months and business days between two dates.

Unit Converter - Convert length, weight, volume, area, speed, time, temperature and data size.

Aspect Ratio Calculator - Find the aspect ratio of any size and resize while keeping the ratio.

Number to Words Converter - Convert numbers to English words for cheques, invoices and documents.

Online Stopwatch - A free stopwatch with lap times, accurate to a hundredth of a second.

Online Countdown Timer - A free online countdown timer with an alarm sound. Set hours, minutes and seconds.

Code Formatters

JavaScript / React Formatter - Format and beautify JavaScript, and React JSX code with proper indentation.

JSON Formatter - Format and beautify JSON data with proper indentation and validation.

HTML Formatter - Format and beautify HTML code with proper indentation and structure.

CSS Formatter - Format and beautify CSS stylesheets with proper indentation.

XML Formatter - Format and beautify XML code with proper indentation and structure.

YAML Formatter - Format and beautify YAML data with proper indentation and validation.

TOML Formatter - Format and beautify TOML configuration files with proper structure.

JSON ↔ XML Converter - Convert JSON to XML or XML to JSON instantly. Free, private and runs entirely in your browser.

JSON ↔ YAML Converter - Convert JSON to YAML or YAML to JSON instantly. Free, private and runs entirely in your browser.

JSON ↔ CSV Converter - Convert JSON arrays to CSV or CSV to JSON instantly.

Regex Tester - Test JavaScript regular expressions live with matches and capture groups.

Virtual Keyboards

Farsi (Persian) Virtual Keyboard - Type in Farsi (Persian) with this free online virtual keyboard. Use your mouse, touch screen or physical keys, no language pack needed.

Arabic Virtual Keyboard - Type in Arabic with this free online virtual keyboard. Use your mouse, touch screen or physical keys, no language pack needed.

German Virtual Keyboard - Type in German with this free online virtual keyboard. Use your mouse, touch screen or physical keys, no language pack needed.

Hebrew Virtual Keyboard - Type in Hebrew with this free online virtual keyboard. Use your mouse, touch screen or physical keys, no language pack needed.

Russian Virtual Keyboard - Type in Russian with this free online virtual keyboard. Use your mouse, touch screen or physical keys, no language pack needed.