Token counter
Paste a prompt, a document or an entire conversation and see the token count, what it costs to send across common models, and how much of each context window it consumes.
/tokens
Free utilities for data, documents and voice
Explore tools without a FlexContext account. Data and document utilities process files locally, and the TTS voice studio runs its voice model in your browser.
No FlexContext account needed. Every tool runs in your browser.
Context & retrieval
Count tokens, split documents, and watch a retrieval ranking explain itself — the mechanics behind every RAG pipeline.
Text chunker
Chunking decides what your retriever can find. This tool splits your text the way a pipeline would, and draws every resulting chunk in proportion so you can see where the boundaries actually landed.
/chunk
RAG playground
Load a document, ask it a question, and watch a real BM25 ranking do its work — with the chunk map, the term statistics, and the exact arithmetic behind every score on screen.
/rag
Ask your documents
Add PDFs, Word files or notes, ask a question, and get a short answer that cites the exact passages it used. The search and the language model both run in this browser, so your files never leave it.
/ask
Summarizer
Pick a PDF, a Word file, notes or a web page and get its key points in the order they appear, each with the page or section it came from. Pick a CSV or JSON table and get its size, totals, ranges and most common values in a few sentences.
/summarize
Report builder
Choose summaries, tables, JSON, notes, web pages and images, in the order you want them, and get one HTML report you can open in any browser, print to PDF or send, along with a Markdown copy.
/report
Data & documents
Profile, filter, convert and validate the files research actually arrives in: CSV, JSON, TSV and plain text.
CSV profiler
Drop a CSV and get the shape of it in one pass — what each column really contains, where the gaps are, how the numbers are distributed, and which fields move together.
/analyze
Analytics builder
Turn a raw export into an answer: pick the columns that matter, filter to the rows you mean, group by a category, aggregate a metric, and chart the result.
/analytics
Format converter
Move a table between the formats that different tools insist on, or encode and decode Base64 — and download the result as a real file without uploading the original.
/convert
JSON validator
Paste JSON to validate and pretty-print it, browse its shape, and when it is broken, get the precise line and column where the grammar first went wrong.
/json
Web & media
Turn pages, images and PDFs into something you can read, cite and reuse.
TTS voice studio
Give your words a voice. Kokoro runs right in your browser: pick a voice, set the pace, and download the audio. No server, no key, nothing uploaded.
/tts
HTML extractor
Give it a page’s source and it returns what you actually wanted: the readable text without the navigation, every link with its anchor text, and any tables as structured rows.
/extract
Image converter
Change format, change dimensions, change quality — see the result and the new file size side by side, and download it without the image ever leaving your machine.
/image
PDF page editor
Combine documents, pull out the pages you need, put them in the right order and fix the sideways scans — locally, on a document that never leaves your machine.
/pdf
Popular tasks
Single jobs people search for by name, each on its own page with the right tool already set up.
CSV to JSON
One object per row, headers as keys, quoted commas handled — then download the .json.
/convert
JSON to CSV
An array of objects becomes a table you can open in a spreadsheet, every key a column.
/convert
Base64 encode and decode
Encode text as Base64 or decode it back, with accents and emoji intact.
/convert
JSON formatter
Pretty-print with 2 or 4 spaces, minify, or sort the keys — and see where it breaks if it will not parse.
/json
Merge PDF
Combine two or more PDFs into a single document, in the order you add them.
/pdf
Split PDF
Turn one PDF into a separate file for every page, or just the pages you pick.
/pdf
Rotate PDF
Turn every page, or only the ones you name, by 90, 180 or 270 degrees.
/pdf
Delete PDF pages
Remove the pages you name and keep everything else, in order.
/pdf
PNG to WebP
Turn a PNG into a WebP, keep the transparency, and see how much smaller it gets.
/image
JPG to PNG
Turn a JPEG into a PNG for editing or for a form that only takes PNG.
/image
Compress image
Lower the quality and the dimensions and see the new file size before you download.
/image
Resize image
Shrink to a maximum width and height, in proportion, keeping the original format.
/image