The practical developer toolbox
Fix files.
Ship with confidence.
Repair broken project files, convert data between formats, and find website or security problems without signing up for a monthly subscription.
Start a workflow
From problem to usable result
Choose the smallest tool that solves the job, then review the output before downloading.
- 1Choose a tool
Search by file type, task, or category. - 2Paste or upload
Limits and paid cost are shown first. - 3Review and continue
Download, share for 24 hours, or upload another file.
Popular fixes and converters
Useful starting points for common developer problems.
Local Data, Text, and Image Converter
Convert JSON, JSON Lines, CSV, XML, Markdown, HTML, plain text, PNG, JPEG, and WebP locally in your browser. Files are not uploaded.
Broken JSON Auto-Repair
Attempt conservative repairs for common JSON punctuation, quote, and bracket mistakes; always validate the result and keep the original.
ZIP Integrity Validator
Open a ZIP with consistency checks and read its regular entries to verify archive readability and decompression integrity; it does not calculate an external checksum.
Single-Page SEO Audit
Fetch one public page with SSRF-safe limits and check its title, meta description, viewport, canonical, H1, image alt coverage, HTTPS, and response time.
Private in-browser conversion
Convert JSON, CSV, XML, Markdown, and images
Files stay in your browser in the Local Data, Text, and Image Converter. No account required.
Browse by outcome
Find the right tool without scanning a giant list.
ZIP & Project Intelligence
15 tools · step-by-step guides
File Converters
25 tools · step-by-step guides
Advanced Error & Debugging
19 tools · step-by-step guides
Smart Code Repair
41 tools · step-by-step guides
Bulk & Automation
14 tools · step-by-step guides
Security & Forensics
23 tools · step-by-step guides
SEO & Website Health
20 tools · step-by-step guides
Reporting & Exports
10 tools · step-by-step guides
Migration & Hosting
13 tools · step-by-step guides
Accessibility & Content
4 tools · step-by-step guides
Security-aware processing
Uploads are bounded, share links expire, and sensitive operations are designed around private working directories. Do not upload secrets you do not need to process.
Pay only when needed
Validators and basic utilities stay free. Larger repairs, scans, and report workflows use visible pay-per-run points instead of a recurring subscription.
Clear next steps
Every tool page links to related tools and a practical guide, with actions to download, share, or upload another file after a run.
Frequently asked questions
Simple answers before you start.
Are File2fix tools free?
Many validators, converters, and small utilities are free. Premium repair and analysis tools show their point cost before you submit.
Do you keep uploaded files?
Most jobs use temporary processing storage. A share link is an explicit exception and expires after 24 hours. Keep your original file and never upload a secret unnecessarily.
Can I upload another file after a repair?
Yes. Successful tool runs show an Upload another file action, a share option, related tools, and the converter hub so you can continue without returning to the home page.