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We present a pulse-preserving multilayer-based extreme-ultraviolet (XUV) monochromator providing ultra-narrow bandwidth (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>Δ</mo><mi>E</mi><mo><</mo><mn>0.6</mn><mspace width="3.33333pt"></mspace><mi>eV</mi></mrow></semantics></math></inline-formula>, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>E</mi><mi mathvariant="normal">c</mi></msub><mo>=</mo><mn>92</mn><mrow><mspace width="3.33333pt"></mspace><mi>eV</mi></mrow></mrow></semantics></math></inline-formula>) and compact footprint (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>28</mn><mspace width="0.166667em"></mspace><mo>×</mo><mspace width="0.166667em"></mspace><mn>10</mn><mspace width="0.166667em"></mspace><msup><mrow><mi>cm</mi></mrow><mn>2</mn></msup></mrow></semantics></math></inline-formula>) for easy integration into high-harmonic generation (HHG) or free-electron laser (FEL) sources. The temporal resolution of the novel design supports pulse durations of typical pump–probe setups in the femtosecond and attosecond regime, depending on the mirror design and focusing geometries over the tuning range of the monochromator. The theoretical design is analyzed and experimentally characterized in a laser-driven HHG setup.