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ONE RESIZER
All-in-One Image, PDF & Document Tools
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Powerful Image, PDF & Document Tools — Right in Your Browser

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PDF Tools

17 Tools
11
PDF
PDF Compressor
Compress PDF documents using balanced compression presets.
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12
Merge PDF
Combine multiple PDF files into one ordered, cohesive document with drag-and-drop page sorting.
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13
Split PDF
Separate a PDF into independent single pages or extract customized page ranges quickly.
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14
STAMP
PDF Watermark
Apply custom text or logo image watermarks with angle, opacity, and positioning controls.
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15
PDF
Merge Images to PDF
Convert and compile multiple JPG, PNG, and photo files into a unified multi-page PDF.
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16
PDF
Image to PDF
Convert JPG, PNG, WEBP and other images into a single high-quality PDF document.
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17
PDF
PDF to Image
Extract all PDF document pages into high-resolution JPG or PNG image files with ZIP download.
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18
TXT
PDF to Text
Extract readable raw text from PDF documents for instant copying or saving as TXT files.
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19
PDF Rotate Pages
Rotate individual or all pages in a PDF document 90°, 180°, or 270° clockwise.
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20
PDF Lock
Secure PDF files with strong password protection and confidential AES permission locks.
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21
PDF Unlock
Remove password security and owner restrictions from authorized PDF files.
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22
PDF Signature
Sign contracts and PDF forms by drawing signatures or placing transparent signature images.
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23
PDF Page Extractor
Select specific pages from large PDF documents and download them as a new compact PDF.
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24
PDF Page Delete
Remove unwanted, blank, or duplicate pages from any PDF file with an interactive page selector.
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25
PDF Crop
Trim margins, headers, or whitespace borders across all pages of a PDF document.
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26
PDF Metadata Remover
Strip author names, creator software, GPS data, and timestamps from PDF documents for privacy.
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27
1 2 3
PDF Page Numbering
Insert customizable page numbers, header/footer text, and formatting styles into PDF documents.
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Why Choose ONE RESIZER?

Engineered for speed, privacy, and precision file transformations.

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Fast & Simple

Streamlined interface with instant browser-based execution. No bulky software or waiting lines.

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Privacy Focused

Tools marked Local process the selected file in the browser and do not upload that file content to One Resizer servers. Website/server requests may still generate standard operational logs.

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One Place for Everything

36 essential utilities covering images, PDFs, spreadsheets, slides, and format conversions.

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No Unnecessary Complexity

Clean workflows with no mandatory sign-ups, no invasive popups, and no artificial watermarks.

How It Works

Simple 3-step file transformations right from your browser.

1

Select Your Tool

Browse our 36 categorized utilities or use quick search to find the exact file tool you need.

2

Customize Settings

Drop your file and set target dimensions, file size limits in KB/MB, or format options.

3

Instant Download

Download your processed, watermark-free file directly to your device.

Browser-Based Image, PDF & Document Utility Platform

One Resizer provides a comprehensive suite of 36 browser-based utilities designed to solve common file management and transformation challenges quickly and safely. Whether preparing passport photos and signatures with custom file size limits for online application systems, compressing heavy PDF reports for email attachments, converting images to PDF, or converting office documents, One Resizer gives you fine-tuned control over quality, dimensions, and file size.

Unlike traditional file conversion services that require uploading your private documents to third-party cloud servers, One Resizer executes processing client-side in your modern web browser using HTML5 Canvas, WebAssembly, and local JavaScript algorithms for supported tools.

Government Portal Image & Signature Resizing Target exact pixel dimensions and strict KB weight restrictions for online application forms.
High-Fidelity PDF Compression & Merging Shrink PDF documents with customized quality presets or join multiple PDFs and images into one.
Bi-Directional Document Conversions Convert between Word, Excel, PowerPoint, HTML, and PDF formats effortlessly.
Comprehensive Local Privacy Where supported, selected files are processed locally in your browser. Normal website requests, security logs, analytics, ads or required libraries may still use network connections as described in our Privacy Policy.

Frequently Asked Questions

Everything you need to know about using One Resizer tools.

Technical Knowledge Base

Practical Guides & File Engineering

In-depth tutorials explaining binary search compression, DPI conversions, and application portal requirements.

Optimization

How Exact KB Resizing Works

How client-side binary search algorithms hit target file limits within ±1 KB tolerance.

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Formulas

DPI, Pixels, CM & Inches Guide

Master the math behind 300 DPI passport photos and print resolution calculations.

Read Guide →
Application Portal Preparation

Exam Photo & Signature Specs

Examples of 20 KB - 50 KB limits and dimension tables for online application portals.

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PDF Engineering

How PDF Compression Works

FlateDecode stream compaction, XObject image downsampling, and object pruning.

Read Guide →
View All 10 Technical Guides →