Convert FASTQ to Markdown.
Drop a FASTQ file and get a clean Markdown summary of its reads in seconds. It runs entirely in your browser, so your file never leaves your device.
Drag & drop your files
or
Optimize for AI & RAG
Extra cleanup for LLM ingestion: strip HTML, fix smart quotes, tidy Unicode and spacing.
Add YAML front matter
Prepend a metadata block (title, source, date, word & token counts) for knowledge bases and RAG.
Add table of contents
Build a linked index from the headings. Handy for long documents.
Export RAG chunks (.json)
Split the result into retrieval-ready chunks. Download per file from the result panel.
Most converters quietly upload your documents to a server. This one physically can't.
Four lines
per read.
Every read in a FASTQ file spans four lines: an identifier, the bases, a separator, and a per-base quality string. To skim a run you want the identifiers and lengths, not the raw sequence wall.
@read1
GATTACAGATTACA
+
IIIIIIIIIIIIII
@read2
ACGTACGTACGT
+
IIIIIIIIIIII
# Reads (FASTQ)
- **Reads:** 2
| Identifier | Length |
| --- | --- |
| read1 | 14 |
| read2 | 12 |
Everything you
actually need.
Sequencing reads in, a clean Markdown summary out, with no server and no account anywhere.
It never leaves your browser
The .fastq is read and parsed on your own device. Nothing is uploaded to any server, ever.
# Heading
- point one
3 chunks
AI & RAG ready
Optional cleanup, YAML front matter, a table of contents and RAG chunk export.
Works offline
Once the page has loaded you can switch off your connection and it keeps converting.
2 reads
Reads become a table
You get a read count, then one row per read with its identifier and length.
Unicode safe
Accents, symbols and non-Latin scripts come through intact as UTF-8.
Free, and unlimited
No sign-up, no quotas, no watermarks. Convert one file or a thousand; it all runs the same way, on your own device.
An index,
not the reads.
Honest about what comes through, and what doesn't. These are the same notes the Formats list shows for FASTQ, so the page never drifts from what the converter really does.
Kept
2- A read count
- A table of read identifiers and lengths (first 200)
Dropped
2- The sequence bases
- The quality scores
FASTQ questions,
answered.
Everything worth knowing before you drop in a FASTQ file.
Other converters.
Working with more than FASTQ? These convert the same way: privately, in your browser.
vCard to Markdown
.vcf
Contact cards.
iCalendar to Markdown
.ics
Calendar events & invites.
SubRip to Markdown
.srt
The most common subtitles.
WebVTT to Markdown
.vtt
Web video captions.
SSA / ASS to Markdown
.ass · .ssa
Advanced styled subtitles.
SAMI to Markdown
.smi · .sami
Microsoft SAMI captions.
TTML to Markdown
.ttml · .dfxp
Timed-text captions.
SBV to Markdown
.sbv
YouTube SBV subtitles.