diff --git a/doc/preview.nvim.txt b/doc/preview.nvim.txt
index 914f72d..a3d4981 100644
--- a/doc/preview.nvim.txt
+++ b/doc/preview.nvim.txt
@@ -157,12 +157,8 @@ Import them from `preview.presets`:
 
   `presets.typst`              typst compile → PDF
   `presets.latex`              latexmk -pdf → PDF (with clean support)
-  `presets.pdflatex`           pdflatex → PDF (single pass, no latexmk)
-  `presets.tectonic`           tectonic → PDF (Rust-based LaTeX engine)
   `presets.markdown`           pandoc → HTML (standalone, embedded)
   `presets.github`             pandoc → HTML (GitHub-styled, `-f gfm` input)
-  `presets.asciidoctor`        asciidoctor → HTML (AsciiDoc with SSE reload)
-  `presets.quarto`             quarto render → HTML (scientific publishing)
 
 Enable presets with `preset_name = true`:
 >lua
diff --git a/lua/preview/presets.lua b/lua/preview/presets.lua
index 8a23766..fc20f89 100644
--- a/lua/preview/presets.lua
+++ b/lua/preview/presets.lua
@@ -93,28 +93,6 @@ local function parse_pandoc(output)
   return diagnostics
 end
 
----@param output string
----@return preview.Diagnostic[]
-local function parse_asciidoctor(output)
-  local diagnostics = {}
-  for line in output:gmatch('[^\r\n]+') do
-    local severity, _, lnum, msg = line:match('^asciidoctor: (%u+): (.+): line (%d+): (.+)$')
-    if lnum then
-      local sev = vim.diagnostic.severity.ERROR
-      if severity == 'WARNING' then
-        sev = vim.diagnostic.severity.WARN
-      end
-      table.insert(diagnostics, {
-        lnum = tonumber(lnum) - 1,
-        col = 0,
-        message = msg,
-        severity = sev,
-      })
-    end
-  end
-  return diagnostics
-end
-
 ---@type preview.ProviderConfig
 M.typst = {
   ft = 'typst',
@@ -159,38 +137,6 @@ M.latex = {
   open = true,
 }
 
----@type preview.ProviderConfig
-M.pdflatex = {
-  ft = 'tex',
-  cmd = { 'pdflatex' },
-  args = function(ctx)
-    return { '-interaction=nonstopmode', '-file-line-error', '-synctex=1', ctx.file }
-  end,
-  output = function(ctx)
-    return (ctx.file:gsub('%.tex$', '.pdf'))
-  end,
-  error_parser = function(output)
-    return parse_latexmk(output)
-  end,
-  open = true,
-}
-
----@type preview.ProviderConfig
-M.tectonic = {
-  ft = 'tex',
-  cmd = { 'tectonic' },
-  args = function(ctx)
-    return { ctx.file }
-  end,
-  output = function(ctx)
-    return (ctx.file:gsub('%.tex$', '.pdf'))
-  end,
-  error_parser = function(output)
-    return parse_latexmk(output)
-  end,
-  open = true,
-}
-
 ---@type preview.ProviderConfig
 M.markdown = {
   ft = 'markdown',
@@ -241,42 +187,4 @@ M.github = {
   reload = true,
 }
 
----@type preview.ProviderConfig
-M.asciidoctor = {
-  ft = 'asciidoc',
-  cmd = { 'asciidoctor' },
-  args = function(ctx)
-    return { ctx.file, '-o', ctx.output }
-  end,
-  output = function(ctx)
-    return (ctx.file:gsub('%.adoc$', '.html'))
-  end,
-  error_parser = function(output)
-    return parse_asciidoctor(output)
-  end,
-  clean = function(ctx)
-    return { 'rm', '-f', (ctx.file:gsub('%.adoc$', '.html')) }
-  end,
-  open = true,
-  reload = true,
-}
-
----@type preview.ProviderConfig
-M.quarto = {
-  ft = 'quarto',
-  cmd = { 'quarto' },
-  args = function(ctx)
-    return { 'render', ctx.file, '--to', 'html', '--embed-resources' }
-  end,
-  output = function(ctx)
-    return (ctx.file:gsub('%.qmd$', '.html'))
-  end,
-  clean = function(ctx)
-    local base = ctx.file:gsub('%.qmd$', '')
-    return { 'rm', '-rf', base .. '.html', base .. '_files' }
-  end,
-  open = true,
-  reload = true,
-}
-
 return M
diff --git a/spec/presets_spec.lua b/spec/presets_spec.lua
index ab030f0..8085a3c 100644
--- a/spec/presets_spec.lua
+++ b/spec/presets_spec.lua
@@ -157,112 +157,6 @@ describe('presets', function()
     end)
   end)
 
-  describe('pdflatex', function()
-    local tex_ctx = {
-      bufnr = 1,
-      file = '/tmp/document.tex',
-      root = '/tmp',
-      ft = 'tex',
-    }
-
-    it('has ft', function()
-      assert.are.equal('tex', presets.pdflatex.ft)
-    end)
-
-    it('has cmd', function()
-      assert.are.same({ 'pdflatex' }, presets.pdflatex.cmd)
-    end)
-
-    it('returns args with flags and file path', function()
-      local args = presets.pdflatex.args(tex_ctx)
-      assert.are.same(
-        { '-interaction=nonstopmode', '-file-line-error', '-synctex=1', '/tmp/document.tex' },
-        args
-      )
-    end)
-
-    it('returns pdf output path', function()
-      assert.are.equal('/tmp/document.pdf', presets.pdflatex.output(tex_ctx))
-    end)
-
-    it('has open enabled', function()
-      assert.is_true(presets.pdflatex.open)
-    end)
-
-    it('has no clean command', function()
-      assert.is_nil(presets.pdflatex.clean)
-    end)
-
-    it('has no reload', function()
-      assert.is_nil(presets.pdflatex.reload)
-    end)
-
-    it('parses file-line-error format', function()
-      local output = './document.tex:10: Undefined control sequence.'
-      local diagnostics = presets.pdflatex.error_parser(output, tex_ctx)
-      assert.are.equal(1, #diagnostics)
-      assert.are.equal(9, diagnostics[1].lnum)
-      assert.are.equal(0, diagnostics[1].col)
-      assert.are.equal('Undefined control sequence.', diagnostics[1].message)
-      assert.are.equal(vim.diagnostic.severity.ERROR, diagnostics[1].severity)
-    end)
-
-    it('returns empty table for clean output', function()
-      assert.are.same({}, presets.pdflatex.error_parser('', tex_ctx))
-    end)
-  end)
-
-  describe('tectonic', function()
-    local tex_ctx = {
-      bufnr = 1,
-      file = '/tmp/document.tex',
-      root = '/tmp',
-      ft = 'tex',
-    }
-
-    it('has ft', function()
-      assert.are.equal('tex', presets.tectonic.ft)
-    end)
-
-    it('has cmd', function()
-      assert.are.same({ 'tectonic' }, presets.tectonic.cmd)
-    end)
-
-    it('returns args with file path', function()
-      assert.are.same({ '/tmp/document.tex' }, presets.tectonic.args(tex_ctx))
-    end)
-
-    it('returns pdf output path', function()
-      assert.are.equal('/tmp/document.pdf', presets.tectonic.output(tex_ctx))
-    end)
-
-    it('has open enabled', function()
-      assert.is_true(presets.tectonic.open)
-    end)
-
-    it('has no clean command', function()
-      assert.is_nil(presets.tectonic.clean)
-    end)
-
-    it('has no reload', function()
-      assert.is_nil(presets.tectonic.reload)
-    end)
-
-    it('parses file-line-error format', function()
-      local output = './document.tex:5: Missing $ inserted.'
-      local diagnostics = presets.tectonic.error_parser(output, tex_ctx)
-      assert.are.equal(1, #diagnostics)
-      assert.are.equal(4, diagnostics[1].lnum)
-      assert.are.equal(0, diagnostics[1].col)
-      assert.are.equal('Missing $ inserted.', diagnostics[1].message)
-      assert.are.equal(vim.diagnostic.severity.ERROR, diagnostics[1].severity)
-    end)
-
-    it('returns empty table for clean output', function()
-      assert.are.same({}, presets.tectonic.error_parser('', tex_ctx))
-    end)
-  end)
-
   describe('markdown', function()
     local md_ctx = {
       bufnr = 1,
@@ -447,116 +341,4 @@ describe('presets', function()
       assert.are.same({}, diagnostics)
     end)
   end)
-
-  describe('asciidoctor', function()
-    local adoc_ctx = {
-      bufnr = 1,
-      file = '/tmp/document.adoc',
-      root = '/tmp',
-      ft = 'asciidoc',
-      output = '/tmp/document.html',
-    }
-
-    it('has ft', function()
-      assert.are.equal('asciidoc', presets.asciidoctor.ft)
-    end)
-
-    it('has cmd', function()
-      assert.are.same({ 'asciidoctor' }, presets.asciidoctor.cmd)
-    end)
-
-    it('returns args with file and output', function()
-      assert.are.same(
-        { '/tmp/document.adoc', '-o', '/tmp/document.html' },
-        presets.asciidoctor.args(adoc_ctx)
-      )
-    end)
-
-    it('returns html output path', function()
-      assert.are.equal('/tmp/document.html', presets.asciidoctor.output(adoc_ctx))
-    end)
-
-    it('returns clean command', function()
-      assert.are.same({ 'rm', '-f', '/tmp/document.html' }, presets.asciidoctor.clean(adoc_ctx))
-    end)
-
-    it('has open enabled', function()
-      assert.is_true(presets.asciidoctor.open)
-    end)
-
-    it('has reload enabled for SSE', function()
-      assert.is_true(presets.asciidoctor.reload)
-    end)
-
-    it('parses error messages', function()
-      local output =
-        'asciidoctor: ERROR: document.adoc: line 8: invalid part, must have at least one section'
-      local diagnostics = presets.asciidoctor.error_parser(output, adoc_ctx)
-      assert.are.equal(1, #diagnostics)
-      assert.are.equal(7, diagnostics[1].lnum)
-      assert.are.equal(0, diagnostics[1].col)
-      assert.are.equal('invalid part, must have at least one section', diagnostics[1].message)
-      assert.are.equal(vim.diagnostic.severity.ERROR, diagnostics[1].severity)
-    end)
-
-    it('parses warning messages', function()
-      local output = 'asciidoctor: WARNING: document.adoc: line 52: section title out of sequence'
-      local diagnostics = presets.asciidoctor.error_parser(output, adoc_ctx)
-      assert.are.equal(1, #diagnostics)
-      assert.are.equal(51, diagnostics[1].lnum)
-      assert.are.equal(vim.diagnostic.severity.WARN, diagnostics[1].severity)
-    end)
-
-    it('returns empty table for clean output', function()
-      assert.are.same({}, presets.asciidoctor.error_parser('', adoc_ctx))
-    end)
-  end)
-
-  describe('quarto', function()
-    local qmd_ctx = {
-      bufnr = 1,
-      file = '/tmp/document.qmd',
-      root = '/tmp',
-      ft = 'quarto',
-      output = '/tmp/document.html',
-    }
-
-    it('has ft', function()
-      assert.are.equal('quarto', presets.quarto.ft)
-    end)
-
-    it('has cmd', function()
-      assert.are.same({ 'quarto' }, presets.quarto.cmd)
-    end)
-
-    it('returns args with render subcommand and html format', function()
-      assert.are.same(
-        { 'render', '/tmp/document.qmd', '--to', 'html', '--embed-resources' },
-        presets.quarto.args(qmd_ctx)
-      )
-    end)
-
-    it('returns html output path', function()
-      assert.are.equal('/tmp/document.html', presets.quarto.output(qmd_ctx))
-    end)
-
-    it('returns clean command removing html and _files directory', function()
-      assert.are.same(
-        { 'rm', '-rf', '/tmp/document.html', '/tmp/document_files' },
-        presets.quarto.clean(qmd_ctx)
-      )
-    end)
-
-    it('has open enabled', function()
-      assert.is_true(presets.quarto.open)
-    end)
-
-    it('has reload enabled for SSE', function()
-      assert.is_true(presets.quarto.reload)
-    end)
-
-    it('has no error_parser', function()
-      assert.is_nil(presets.quarto.error_parser)
-    end)
-  end)
 end)