ToolKoala Blog
Engineering notes on browser-based privacy tools.
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OCR in 2026 — Tesseract vs Google Vision vs ChatGPT vs Apple Live Text (Real Accuracy Numbers)
2026-05-22I tested 4 OCR tools on 100 real-world images — receipts, screenshots, handwriting, multi-language docs, low-light photos. Here are the actual character accuracy numbers, not the marketing claims.
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How to Save a PDF as JPG — 4 Methods Tested (Without Adobe Acrobat)
2026-05-22Adobe Acrobat is $20/month. Here are 4 free ways to save a PDF as a JPG image — Preview, Word, online services, and browser tools — tested with real PDFs, with quality comparisons and file size numbers.
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Remove Background from Images in 2026 — Honest Comparison of Photoshop, Canva, GIMP, and Free Browser Tools
2026-05-22I tested 6 tools on 30 images — product photos, portraits, hair, fur, glass. Here's which one actually wins, where each fails, and why the answer depends on what you're shooting.
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How We Built a Video Compressor That Never Uploads Your File
2026-05-20Most "online video compressors" send your file to a server. Here's how we built one that runs 100% in your browser using FFmpeg.wasm — and how you can verify it yourself in 10 seconds.