Online PDF compression tool experience: easy to use, but keep safe boundaries

Smallpdf、PDFcompress、PDF24light flashPDF… online compression tools are as furry as cattle. They are free to install, fast to get started, and many people are pressingPDFFirst choice. After all these years, my conclusion is: emergency artifacts, but not without brain - especially the content of the file, the security boundary must be held.

Mainstream Tools Landscape Impression

Smallpdf: The interface is the cleanest, compressed"Strong compression/Recommended Compression"Two gears, ordinary files are pressed to1/3Around. The free version has a limit of times per day, you need to subscribe if you exceed it.

PDFcompress: The most complete function, compressing, merging, splitting, formatting. The compression is optional in three tiers, the free quota is refreshed by the hour, and it is friendly to light users.

PDF24: German tool, featuringCompletely free Unlimited, a local offline version is also available for download. Compression mass fraction multifile (72/150/300dpiOptional), is the king of free in my heart. The disadvantage is that the server is abroad, and the upload and download are slightly slow.

light flashPDFand other domestic tools: Fast, good Chinese, but the free version is more limited, advertising and guided paid pop-ups are more intensive.

My Selection Principles

Processing is divided into three stages according to file sensitivity:Public profile(E-books, public reports downloaded online)→ Whichever one you use;General working documents → 用PDFcompressORPDF24, immediately delete the file on the website (most stations have a manual delete button);Confidential/Private Files(Contracts, documents, financial data)→ Never use online toolsPerangkat iniWPSORAcrobatSolve it. Remember: uploading a file to an online server is tantamount to handing over control,"Auto remove"Just promising is not a guarantee.

3 tips to improve your experience

one isPress ahead and upload again: Some online tools have a free limit on upload size (e.g. over50MBFor a fee), first use the local tool to roughly press a round and then put on the line to press.

Second,Take advantage of multi-file comparisons: Press the same file once with different files, download and compare the lowest file that can be accepted by the picture quality, do not give it to the superstition tool"recom"。

Three YesBatch Tasks Do Not Use Web Page: Dozens of files uploaded and downloaded one by one are too tortured, this scene is directly replacedWPSBatch compression or local scripts.

Online tools are a bridging solution, not the ultimate solution - light users are great, heavy users are still worth keeping a handy set locally.