Free tools
Email utilities that run in your browser
Free, no signup, and private by design: your files are parsed locally on your device and never uploaded — the same philosophy as InboxBucket itself. The only tools that touch the network are the DNS checkers, which send the domain name you type (and nothing else) to a public DNS resolver.
Open & convert email files
.EML File Viewer
Open any .eml email file in your browser — headers, body, and attachments. Parsed locally, never uploaded.
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.MSG File Viewer
Open Outlook .msg files without Outlook — message, recipients, and attachments, parsed locally. One-click export to .eml.
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MBOX Viewer
Browse a Google Takeout .mbox export in your browser — search messages, read them, and extract single emails as .eml.
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Winmail.dat Opener
Got a winmail.dat attachment? Extract the real files and message from Outlook's TNEF format — decoded locally, never uploaded.
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EML to PDF Converter
Turn a .eml file into a clean, printable PDF with your browser's own print engine. No watermark, no install.
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MSG to EML Converter
Convert Outlook .msg files to standard .eml in your browser — drop a whole batch, download all as a .zip. Nothing is uploaded.
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MBOX to EML Converter
Split a Google Takeout .mbox export into individual .eml files, one per message, delivered as a .zip. All in your browser.
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EML to MBOX Converter
Combine loose .eml files into one importable .mbox mailbox for Thunderbird or Apple Mail. Built locally, nothing uploaded.
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EML Attachment Extractor
Pull attachments out of one or many .eml files — download individually or as a single .zip. Decoded locally, never uploaded.
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Email deliverability & DNS
Email Header Analyzer
Paste raw headers to trace the delivery path hop by hop, spot delays, and check SPF, DKIM, and DMARC results.
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SPF Record Checker
Look up any domain's SPF record, expand every include, and count DNS lookups against the 10-lookup limit — in plain English.
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DKIM Record Checker
Check a DKIM key by domain and selector — key strength, revoked keys, and a best-effort scan of common selectors.
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DMARC Record Checker
Look up a domain's DMARC policy with every tag explained, plus health warnings for weak or missing settings.
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DMARC Record Generator
Build a ready-to-publish DMARC TXT record with a guided form and a safe rollout plan — from monitoring to full reject.
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DMARC Report Viewer
Drop the .xml, .gz, or .zip attachments from your DMARC reports and get a readable table: sources, volumes, and what fails.
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Contacts & calendars
VCF to CSV Converter
Convert vCard contact exports (.vcf) to a clean CSV for Excel, Google Sheets, or CRM import. Parsed locally, never uploaded.
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ICS File Viewer
Open any .ics calendar file and browse its events — times, attendees, recurrence — without importing anything into your calendar.
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