LensUp Blog https://lensup.ai/blog/ Benchmarks from the LensUp team: how our in-browser document scanner and tools measure up on public datasets and against other tools, misses included. en Tue, 13 Oct 2026 00:00:00 GMT Word and EPUB to Markdown: what four converters keep, feature by feature https://lensup.ai/blog/docx-epub-to-markdown-converters-tested/ https://lensup.ai/blog/docx-epub-to-markdown-converters-tested/ Tue, 13 Oct 2026 00:00:00 GMT Footnotes, equations, images, a table inside a table: LensUp, Pandoc, markitdown and mammoth on the same DOCX and EPUB files, losses included. benchmark docx-to-markdown epub-to-markdown Make a PDF look scanned: four free tools, one test file https://lensup.ai/blog/make-pdf-look-scanned-tools-tested/ https://lensup.ai/blog/make-pdf-look-scanned-tools-tested/ Tue, 13 Oct 2026 00:00:00 GMT Pages kept, no text left to select, still readable: we gave the same two-page PDF to four free scanned-look tools, LensUp included, and checked each file. benchmark pdf-to-scanned-pdf Passport photo makers against the US rules: five free tools, two photos https://lensup.ai/blog/passport-photo-makers-tested/ https://lensup.ai/blog/passport-photo-makers-tested/ Tue, 13 Oct 2026 00:00:00 GMT Head height, background, file type and size: we ran a close-up and a far photo through five free passport photo makers, LensUp included, and measured each file. benchmark passport-photo Redact a PDF online: are the words really gone? Four tools tested https://lensup.ai/blog/redact-pdf-online-tools-tested/ https://lensup.ai/blog/redact-pdf-online-tools-tested/ Tue, 13 Oct 2026 00:00:00 GMT A black box can leave the words in the file. We redacted the same contract and bank statement in LensUp, iLovePDF, Smallpdf and i2PDF and checked what was left. benchmark redact-pdf Hitting a KB limit, printing at 3.5 × 4.5 cm, copying an ID card: we measured nine online tools https://lensup.ai/blog/kb-cm-dpi-id-card-tools-benchmark/ https://lensup.ai/blog/kb-cm-dpi-id-card-tools-benchmark/ Mon, 12 Oct 2026 00:00:00 GMT Compress to 100 KB, resize to 3.5 × 4.5 cm at 300 DPI, put an ID card on A4: LensUp and eight other free tools, measured file by file, misses included. benchmark compress-to-size resize-in-cm id-card-copy How well does a browser scanner find the page? Our corner finder on 1,500 SmartDoc frames https://lensup.ai/blog/smartdoc-2015-corner-detection-benchmark/ https://lensup.ai/blog/smartdoc-2015-corner-detection-benchmark/ Sat, 10 Oct 2026 00:00:00 GMT LensUp's page-corner finder on 1,500 SmartDoc 2015 frames, next to a textbook OpenCV method: where it finds the page, where it fails, raw results included. benchmark document-scanner corner-detection