All Free Conversion Tools

25+ browser-based tools for images, documents, audio & video. No uploads, no signup — everything runs locally on your device.

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Why Convertlo

Everything free. Nothing uploaded.

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Zero uploads

Files never leave your device — not even for a millisecond. All processing runs inside your browser.

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No signup

No account, no registration, no onboarding friction. Open the page and start converting immediately.

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No email required

We never ask for your email address. No newsletter, no drip campaigns, no marketing emails — ever.

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Free forever

No credit card, no premium tier, no paywall. Every feature is free with no conversion limits, no watermarks.

Fast

Browser-native APIs (Canvas, FFmpeg.wasm, PDF.js) process files instantly — no waiting for server queues.

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Private & secure

100% on-device processing. No data breach risk, no server logs, nothing to intercept in transit.

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Works offline

Cached as a PWA after first visit. Convert images and documents without any internet connection.

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190+ formats

73 image, 43 document, 30 audio, 45 video formats — the most complete browser-based format library.

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Blog & guides

100+ free tutorials, format comparisons, and how-to guides to help you work smarter with files.

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Any device

Works on desktop, tablet, and mobile. Compatible with Chrome, Firefox, Safari, and Edge.

🖼️ Image Converters 12
📄 Document Converters 21
🎵 Audio Converters 11
📱 HEIC / iPhone Tools 5
🎬 Video Converters 11
GIF & Animation 8
🖼️ More Image Converters 49
🎯 Use-Case Guides 10
🎵 More Audio Converters 20
📄 More Document Converters 37
🎬 More Video Converters 35
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Comparisons & Buying Guides

Not sure which tool is right for your job? These guides compare the best options.

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Best Free Image Converters
Top 5 tools compared for 2026
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Best Free Video Converters
No upload, no watermark options
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Best Free Audio Converters
MP3, WAV, FLAC — compared
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Best Free PDF Converters
No sign-up, no upload options
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CloudConvert Alternatives
Free, unlimited, no credit limits
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Convertio Alternatives
7 tools that skip the daily cap
FreeConvert Alternative
Unlimited, no upload required
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Zamzar Alternative
No email, instant downloads
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TinyPNG Alternatives
6 free image compression tools
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Canva Image Converter Alt.
Convert images without signing in