PNG Repair: Fix Corrupted PNG Files Online

Recover a corrupted PNG file that won't open — we rebuild it and hand back a clean, working .png. Free, online, no watermark.

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Upload the broken or unreadable .png file.
We re-read it and rebuild its structure.
Download the repaired .png file.

png.repair brings broken PNG files back to life. Upload a corrupted .png that won't open and the tool rebuilds its structure to recover a clean, working file. Free, no account, no watermark.

Our guides explain why PNG files corrupt, what repair can and can't recover, and how to avoid losing files in the first place.

One job, done well: PNG repair

png.repair does exactly one thing — rebuild a damaged .png file — and tries to do it better than a general converter. If a file is too far gone to rebuild whole, it recovers as much as it honestly can.

PNG repair guides

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PNG format explained PNG Chunks Explained: IHDR, IDAT, IEND and the Rest A practical guide to PNG chunks: which are essential, which can be dropped, and how this knowledge helps repair corrupted files. 4 min read PNG format explained The PNG File Signature: 8 Bytes Every PNG Needs Every PNG file starts with an 8-byte signature; this guide explains each byte and what happens when the signature is damaged. 4 min read Why PNG files corrupt "IDAT: CRC Error" in a PNG: What It Means and How to Fix It A practical guide to understanding and fixing the "IDAT: CRC error" and related libpng checksum failures in corrupted PNG files. 3 min read Preventing file loss How to Prevent PNG Corruption A practical guide on how to prevent PNG corruption, covering safe saves, reliable backups, verified downloads, and storage health so your images stay openable. 5 min read How to repair PNG How to Repair a Corrupted PNG File A complete walkthrough on how to repair a corrupted PNG file online, covering why viewers reject broken PNGs, the exact repair steps, and what the tool can and cannot fix. 5 min read Recovering PNG data Recovering a Damaged PNG Image A clear technical guide to recovering a damaged PNG image, explaining how chunks and CRC checksums work, what pixel and alpha data can be salvaged, and where the limits lie. 5 min read Why PNG files corrupt Why PNG Files Get Corrupted A plain-English explanation of why PNG files get corrupted, covering CRC checksum failures, truncated downloads, editor and screenshot crashes, and transfer errors. 5 min read

PNG Repair FAQ

Is png.repair free?

Yes — the tool is free, with no watermark and no account.

What corruption can it fix?

Broken headers, damaged indexes and interrupted downloads recover well. Badly truncated .png files may only partly recover — the tool tells you honestly.

Are my files private?

Files are processed in an isolated workspace and removed shortly after download.