LightConv

Comparison · LightConv vs Smallpdf

LightConv vs Smallpdf

A PDF-focused suite that also handles common image and document conversions, popular as an in-browser alternative to Adobe Acrobat.

This page lays out what Smallpdf (founded 2013, freemium with strict daily limits on the free tier; conversions happen on smallpdf's swiss servers.) does that LightConv doesn't, and what LightConv does that Smallpdf doesn't. Both tools exist for a reason — the right pick depends on what you're converting and where the file should be allowed to go.

Smallpdf's primary audience: Office users who need to merge / split / sign PDFs or convert between PDF and Word, plus some image conversion as a side feature.

Side-by-side

Dimension
Smallpdf
LightConv
Edge
PDF tooling
Comprehensive (merge/split/sign/OCR/compress)
Not supported
Smallpdf
Image conversion location
Uploaded to Smallpdf's Swiss servers
In your browser tab (WebAssembly)
LightConv
Free tier limits
~2 operations/hour, watermarks on some outputs
Unlimited, no watermarks
LightConv
Privacy posture
Swiss hosting + privacy policy
Zero network requests during conversion (auditable)
LightConv
Developer tools
None
CSV ↔ JSON, JSON ↔ YAML, JWT, Base64, UUID, SHA-256
LightConv
Mobile / desktop apps
iOS + Android + Mac + Windows + Office plugin
Browser-only (installable PWA)
Smallpdf
Offline support
Desktop app supports it
Browser PWA supports it
Tie
Speed visibility
No timing shown
Per-file ms + MB/s
LightConv

Smallpdf is the better pick if

  • You're working with PDFs — merging, splitting, signing, OCR, redacting, e-signing
  • You need PDF ↔ Word/Excel/PPT conversion
  • You need batch document processing with cloud-storage integration
  • You need a desktop app or mobile app, or Office plugin

LightConv is the better pick if

  • You're converting images and the file shouldn't leave your machine — common for medical, legal, ID-related images
  • You hit Smallpdf's free-tier daily limit and don't want to pay for sporadic use
  • You're a developer who'd benefit from CSV/JSON/YAML/JWT/Base64 tools alongside image conversion
  • You want to run conversions offline (PWA install)

Smallpdf's strengths — credit where due

  • Best-in-class PDF tooling — merge, split, sign, OCR, compress, e-sign, redact, page reorder — that's their core
  • Office-format roundtrips (PDF ↔ Word/Excel/PPT) that need real document parsers, not just image codecs
  • Hosted in Switzerland with a stronger privacy posture than the typical US-hosted SaaS
  • Mobile apps + desktop integrations + Microsoft Office add-in

Where LightConv has the structural edge

  • Image conversions (HEIC, PNG, JPG, WEBP, AVIF) happen entirely in your browser — Smallpdf still uploads even simple image conversions
  • No daily limit — Smallpdf caps free users to ~2 operations/hour
  • No watermark on any output — Smallpdf adds watermarks on some operations for free users
  • Real-time performance metrics — you can see your image converted faster than the upload would have taken
  • Includes developer tools (CSV/JSON/YAML/JWT/Base64/SHA-256) Smallpdf doesn't cover

If LightConv sounds like the right pick for your use case, start at the homepage — every tool is on one page and the conversion happens before you finish reading the card.