PDF压缩助手 - 文件瘦身到指定大小

The PDF file is too large and the upload for registration fails? Compress it to 500KB, 1MB, 2MB, 5MB in one click, automatically balancing clarity and size. All files are processed locally and not uploaded to the server. Free to use, Pro supports unlimited and batch compression.

PDF Compression Helper is a local tool dedicated to compressing PDF files. It is easy to operate, fast, and privacy-conscious.

—— Have you encountered these problems? ——

• The registration system prompts "Please upload a PDF file smaller than 2MB", but your file is 8MB.
• For civil service exams, teacher qualification exams, and postgraduate registration, the data upload always exceeds the size limit.
• Visa materials and passport scans are too large to be uploaded to the embassy website.
• The email attachment exceeds the 25MB limit and the sending fails.
• The scanned copies for IELTS and TOEFL registration are too large to be submitted.
• The PDF files of contracts, invoices, and resumes need to be quickly reduced.

If you are troubled by these problems, PDF Compression Helper can help you solve them in seconds.

—— Core Features ——

【Compress to Specified Size】
Select the target size, and the App will automatically adjust the compression parameters. Supports common targets:
• 500KB - Suitable for registration systems and ID photo uploads.
• 1MB - Suitable for civil service exam and teacher qualification exam registration.
• 2MB - The most commonly used, suitable for most registration and data submission systems.
• 5MB - Suitable for visa and passport material uploads.
• 10MB - Suitable for email attachments and data sharing.
• Custom - Set any target size according to your needs.

【Automatic Compression Strategy】
After selecting the target size, the App will automatically balance between clarity and size, and try to compress to the target you choose.
If the target is too aggressive, the App will prompt in advance that it may not be able to fully reach the target, but still allows you to try.

【Compression Results at a Glance】
• Displays the original size and the size after compression.
• Displays the compression ratio (such as a 78% reduction).
• Clearly indicates whether the target size is reached.
• You can directly preview the PDF after compression to confirm whether the clarity meets the requirements.

【Save and Share】
• Save to iCloud Drive, local folders or other locations.
• Share via WeChat, email, AirDrop, etc.
• Automatically generates the filename after compression for easy management.

—— Applicable Scenarios ——

• National/Provincial Civil Service Exams - The registration photos and data PDFs exceed the size limit.
• Teacher Qualification Exam - The uploaded materials require a PDF smaller than 2MB.
• Postgraduate Entrance Examination Registration - The scanned copies are too large in size.
• IELTS/TOEFL/GRE - Compress the registration materials PDFs.
• Visa Application - The scans of passports, ID cards, and employment certificates are too large.
• Government Affairs Handling - There are size limits for uploading PDFs to the social security, housing provident fund, and tax systems.
• Job Hunting - The resume PDF is too large as an email attachment.
• Enterprise Office Work - Contracts, invoices, and quotation PDFs need to be compressed and sent.
• Academic Papers - There are strict size limits for PDF in journal submission systems.

—— Privacy Protection ——

PDF Compression Helper processes all files locally on your device. The PDFs you select will not be uploaded to any server. The App will not read, save, or share the content of your files.

We do not integrate any third-party data analysis, advertising tracking, or statistical SDKs. Your files and usage data always belong to you alone.

—— Warm Tips ——

The compression effects of different PDF files may vary:
• Scanned copies and picture-type PDFs - The compression effect is usually obvious (can be reduced by 50% - 90%).
• Pure text PDFs - They are relatively small in size by themselves, and the compression space may be limited.
• If the target size is not reached, it is recommended to try the extreme mode or select a larger target.

—— PDF Compression Helper Pro ——

Free users can compress once a day, meeting occasional usage needs.

After upgrading to Pro, you can enjoy:
• Unlimited PDF compression times.
• Compress to custom target sizes.
• Automatic compression parameters, trying to balance clarity and file size as much as possible.
• No ads, no distractions.